As an European u will go on trusting USDT more than USDC.
The battle Tether Guys are fighting is a right one, as MicaR regulation is detrimental to stablecoins.
The fact that USDT is not available in Europe means little to me.
I also have the feeling that I will not feel the unavailability of USDT much, but if it really is banned from the EU, it will probably require additional checks to see if some service accepts Tether or if a conversion has to be done beforehand. So it cannot be said that there will be absolutely no impact of Mica regulations on my personal use.