I for one am glad they're continuing support for the EZ4.
There was incentive to move on back in the DS days, and EZVi was nice (I still want to get one of those), but it's hard to compete against DSTwo+ and R4i Gold/AK2i right now, and 3DS is pretty much dead in terms of flashcards.
GBA on the other hand... only other option was the Everdrive which is a really good card, but it also costs an arm and a leg. Glad they recognized that and resumed making them, especially with microSD support (I've got the original miniSD model, good card, but my first miniSD failed on me and replacements are hard to come by, had to shell out like $25 for just a 2GB.)
EZ4 is super cheap and lacks some features but it's a really damn good GBA flashcard despite that. RTC I can deal without, and the required game patching was the main thing going against it but that's soon to be a thing of the past entirely.
Kind of too bad they already got my money for it years ago. I'd donate extra money for the work they've done on it since
I just hope the universal soft reset patch works with 100% compatibility. If it doesn't work on certain games and still requires manual patching then it's kinda eh.
btw, any games that require the hard reset to work properly anymore? I had issues back in the days with Yoshi's Island and someone gave me the 1.72RESET fw that does hard reset by default and that fixed it, I just hope that upgrading to 2.01 won't require me to hold L+A while loading certain games. Rather every game just work by default without having to do weird maneuvers

(having hard reset be default behavior would be ideal tbh, it's only like 2-3 seconds longer when loading a game due to GBA bios logo but if it guarantees games will work properly then it's worth it.)