The trick is just buying 1 domain and putting every project on a different subdomain.

Apart from this I see myself represented in this post.

Yes! Build a "platform". I learned that as well. Also saves your from having to come up with snazzy names for your "new product" as you can just name it after its function, notes.mydomain.com

You can do that for the odd small tool, but you can't launch GreatNewThing™ without having it's own full domain!

Except it never gets any users.

I suppose the plus side to spending months rather than days on projects that never go anywhere is I have fewer domains. Only 7 here. Sigh.

I do that, but I’m never satisfied.