Hi.
All things must pass they say, progress most continue.
The only reason I would swap the T4 for a T5, would be the 76 keys.
The only reason to keep the Yammie for a "Styleuser" as me, is that the trillions of styles to choose from, and that there still are created a lot of new nice stylefiles for the brand.
Miss the "good old" Technics KN5K a lot, Sd1 and G-70 not quite as much.
Would love to try PA4X-76, but hard to find in this country, if any at all.
Even Thomann in Germany say "at request"