Most other people use a normal mouse
Since I also have a lot of muscle memory using normal mice, I am able to quickly adjust to working on a new PC
Others struggle when they have to take over my PC and show me something by navigating with my trackball
I am guessing this might be similar -- since OP does have years or muscle memory with normal keyboards anyway to back them up
I use a 50 euro Razer Naga X mice at the moment which is nice (with the extra buttons).
But, it's unreasonable that you stick to the lowest common denominator if you're going to be using your own setup 99% of the time.
I'd say a bigger disadvantage to non-traditional setups (trackballs, non-qwerty, small keyboards, etc.) is "others won't be able to use your stuff".
Also don't use any editor other than Notepad.