1. Standardized keyboard. For some reason modern laptops hate Home/End/PgUp/PgDwn buttons; but I use them literally every minute of my typing. Arrow keys too are tiny, up and down look to be sharing the same key - so basically unusable on regular basis.
2. Trackpoint/Nub/Nipple. If you're trying to make a small laptop, rather than crippling keyboard for the sake of massive giant trackpad, Trackpoint is the way to go. Granted, higher learning curve for many, but very rewarding in the end.
Again, understanding we are now talking a niche of a niche - "want standard keyboard and trackpoint" subset of "want practical modular laptop"; but that's why old school Thinkpads are still so prized for some.