No problem for websites. But I noticed that some (stupid) websites or forms from my business suppliers won't accept email adresses which are not a well known ol

No problem for websites. But I noticed that some (stupid) websites or forms from my business suppliers won't accept email adresses which are not a well known old TLD like .com or country TLDs. I'm also guessing that the new gTLDs also cause a ton of problems on legacy email systems out there. So for email to be on the safe side I'm using .com but a new TLD is no problem for websites (that's my experience).