I use spaces everywhere I can, it’s part of a pattern I use that’s easy for me to remember for when I have to enter it often, and the space usually counts as a special character. I’d say 90-95% of the time it works.
If you're living the passphrase life then spaces make them easier to type.
I do but then again I am different in that I built a secondary keyboard that (macro) types long passwords for me. Bank site: Shift H. Think of it as a password manager that has an encrypted index (my brain) using hardware and without the index is mess of random characters. Portable and external.