Maybe I am overly optimistic, but I feel like things are starting to move--4 developments to watch this week. Note that in Europe, "summer travel" generally means July-August.
1. Spain supposedly opened to vax US tourists today. We should see on the news tomorrow (6/8) if it's true.
2. Same for France on Wednesday--watch for news on Thursday.
3. Upcoming UK-US summit--maybe some announcement???
4. EU countries have made announcements about their "green passports"...
https://www.schengenvisainfo.com/news/eu-covid-19-passport-to-be-open-for-international-travellers-including-uk-us/
And yes, I agree that at this point it's ridiculous to keep borders closed to vaccinated travelers.