Did he evade ban?
I checked a little bit and I didn't find any evidence of that, but I am sure that others will check it more thoroughly.
I know a lot better than 2018 so may be i can make something for myself and others. It's been a long time so it's not unusual that i can write in more matured way than before as my knowledge expands a lot
Yeah that is normal, to improve both posting style and language. Suspicious thing would be if your English suddenly regressed and I was mainly aiming at that.
I can send a message from my old registered email address("I do not want to share my old email address publicly") to any moderator if i really needs to prove my account ownership. I do not know what more to say and i think it is not any violation of rules to be active after a long time.
You could eventually sign a message from your old address to remove any possible doubt (if you have access to any of the addresses that you used in the past) that account hasn't changed hands.