I also have the Kinesis advantage 2, and am also a fan of the convex keys. I also ordered a Kinesis 360 several months ago, but have not received it yet.
Started with a vanilla config and remapped caps to ctrl. After a while I got emacs pinky, so I decided to switch to spacemacs and vim key bindings. I tried doom-emacs and a couple of other "emacs-distros", but I kept coming back to spacemacs.
The combination of 'evil' together and chords, like pressing 'fd' or 'jk' in short succession working as an escape key made me rely a whole lot less on the pinky.
A while ago I went all in on rolling my own config, now that I know how I want my environment. Next step for me will be learning to type on a keyboard with a thumb cluster to rely even less on the pinky.
Sometimes I have doubts. I wonder if I am doing this all wrong? Maybe a step backwards would be better - just use gedit or acme and a mouse? Unfortunately, I think I am too far down the rabbit hole to look back up now.
For quick command line things or remote tasks I still use Vim. I know, I know, emacs does all that also.
Ctrl Win Alt Space Alt Menu Win
to
Win Alt Ctrl Space Ctrl Alt Win
which allows me to use my thumbs for ctrl bindings, without using a nonstandard layout (well I'm using a Kinesis Freestyle2 so it's not entirely standard). I also worked on my typing a lot and specifically forced myself to use the ctrl key on the opposite side of the letter key in ctrl-letter bindings.
Not only has it made emacs much more ergonomics it also carries to the keybindings of other programs too, most of which are control key based. Using a hardware programmable keyboard makes it possible for me to use those remaps without admin access or installing any programs in every OS (corporate environment).