One reason to proceed is that it's just going to get more difficult to leave if you stay. Eventually you may be locked in.
Another reason is that some of the steps aren't difficult with the right software. I switched to Mail In A Box myself 5 months ago and am happy with it.
MIAB takes care of most of the DNS setup. rDNS is one exception; that part needs to be set up externally.
MIAB works with Thunderbird for desktop and K-9 Mail for phone.
Mastodon server for creative rationalists. Intended for light or technical discussion as opposed to strong debate.
Discouraged: Identity politics, religion, profanity, national events, X-rated discussion or materials. We might set up other servers for those things.
Encouraged: Creative Commons works, Minetest and other FOSS games, FOSS, writers, artists, recipes, rhymes, cat photos, G-rated webcomics.