This is a continuation of my recent entry about what I think makes a good laptop.
Display And Keyboard Size
I used to think a larger screen would be better, because you could see things better. But when sitting directly in front of the thing, it doesn't really make a difference whether the screen is 12 or 15 inches across. Larger screens tend to be available with higher resolutions. I think my preference for 15 inch laptops come from a time where there was a notable difference in price between laptops with screens with hardly acceptable and good resolution. But I've come to accept smaller-than-HD resolutions even though there are tasks where it really makes a difference. But with 15 year-old laptops, an HD screen doesn't have to make the thing much more expensive. So there are options, even with 12 inch devices.
The other thing is the keyboard (again). A larger device has more room for a more comfortable keyboard. HP makes use of the extra room. Dell didn't, at the time the laptops I'm interested in were made. In mobile workstations with a 15.6 inch screen can have a numblock, a 14 inch one can be less crowded (no half-size keys, spaced out special keys, extra rows). EliteBooks used to do a good job at that up until the 3rd generation. 12.1 inch Thinkpads (or the newer 12.5 inch ones) are a good example for crowded laptop keyboards. Not a bad keyboard. But there just isn't enough space to include and position all the keys one might want to have where one might want to ghave them. The thing is: 14 and 15 inch ThinkPads and Latitudes use the same keyboard layouts as their 12 inch counterparts. That's another plus for EliteBooks if you want a larger than 12 inch device.
So, since I'm on the ThinkPad bandwagon right now, and somebody gave me a ThinkPad X201 from their scrap box, I think that might be what I'm going to use next. I wouldn't have considered a 12 inch device. But, internals aside, it's just as nice to use as a T400, but ligher and taking up less space. I think if I had been introduced to ThinkPads through an X201, X200 or similar, I would have understood the hype much quicker. I will not go much into other manufacturer's counterparts to the ThinkPad X2xx series. But it is worth mentioning that both HP and Dell had similar devices to the X200/X201 both in clamshell and convertable/talet versions and their keyboards aren't worse. The Dell XP2 has a little fan in me. But those might be a topics for another entry.
Old Case With New Oragns, Frankenpads
I don't have anything agains newer hardware. I'm just not ready to give up on laptop keyboards that feel nice to use. The trend of thinner laptops with larger batteries in recent years has been made possible by smaller mainboards with highly integrated CPUs or SoCs. I imagine that the size of modern laptop keyboards is very helpful if one would decide to build a newer PC into an old laptop case. The X201 doesn't seem to be popular for this anymore. Most people seem to preferr newer models for some reason. I would have thought that is one of the most popular devices for Frankenpads, even if it's a bit more work. The keyboard is of the old style, small case still with a lid latch, but there already was an option for a track pad. I have not gathered too much information about doing this myself. But there seems to be enough resources and support in forums to make it a doable project. But you don't even have to. There is a commercial offer for X201s with 10th generation Core i CPU.
I did think about getting a 486 laptop with a really nice keyboard and mod a newer board into that. It would be a nice project. But not as practical as an X201 or similar. After all, the case would be much thicker. Most 486 laptops were about twice as thick. That would make it easier to fit a different board into it and position connectors in the right spots. Most designs wouldn't have room for a trackpad. The availability of replacement parts for ThinkPads is also a good reason to use a ThinkPad for this. But it would be a nice project. Maybe even with an ultraportable electronic typewriter. But for a laptop to buy, the X2100 si the best compromise for many reasons; and you can get it readily built by someone with experience in doing exactly that.