I stopped playing for a few years way back when, during that time they forced everyone to switch their accounts to Microsoft accounts. Next time I tried to play it wouldn't let me log in and wouldn't let me migrate my account either. I shit you not, it took Mojang support 6 fucking months to respond to my ticket with anything other than an automated message.
Microsoft has been pretty terrible, but I love the game too much to give up on it. As a little consolation, the removal of the insecure mojang accounts leads to less black market account selling, which in turn means less hacking on large servers.
I'm still locked out, and can only log in and play with my paid account through unofficial clients. Support felt like being kicked in the nutte sac repeatedly. Thank you Microsoft, very cool