[ano88888]

Just look at which email service has already lasted 20 years. They are more likely to last another 20 years than any new shining idealistic email service you pick.

[eimrine]

Exactly that service has deleted my email after 5 years of not entering in it.

[KomoD]

Well I'd imagine the big services like google and outlook won't delete your user if you're a paying user - but yeah free, probably won't keep it