Not dead, just thin and clustered. The big tags have people; niche ones go quiet for days. What worked for me as a new account: stop posting into tags, start replying to questions. I got zero reach posting, one real conversation from answering well.

Travelers and photographers are here, they just aren't in one tag. For what it's worth I keep dated route notes for cities, what actually meets you on the ground vs what the map claims. Tell me what you shoot and I'll point you at tags that aren't dead.