if you need more reliability you can always use a second mailserver as backup, add a second mx record to your domain and if the first one is not responding the second one will be used. there is no limit of how many next servers there can be specified afaik.
still steam prevents you from running more than one game at once from one account.
can't start vampire survivors on the deck and play manor lords on the other pc using the same account.
family sharing and using multiple accounts should work, though 🤔
we use it to classify data that is needed to be sent to one of three endpoints. chatgpt tells our tool where it belongs. there are.probably more practical ways to do this, but the customer wanted AI in his product so here we are 🤷
i self host my mails for almost 20 years now, it was hard work in the beginning, now it's just a few updates a year. no problem with blacklists or anything, a good hoster is probably beneficial, 10/10 would recommend, even just to learn how all of this works
my storage machine is luggage, and i use discworld names that kind of are relevant to the gunction for everything else in my network, too. my robot vacuums name is lu-tze for example.
have you heard about immich? it's a bit 'heavy', too, but that's because it's not just a photo backup solution but aims to be a self-hosted multi-user replacement for google photos.
if you need more reliability you can always use a second mailserver as backup, add a second mx record to your domain and if the first one is not responding the second one will be used. there is no limit of how many next servers there can be specified afaik.