We've kept ourselves SD from everyone except our married couple friends who are retired medics with health issues since before lockdown, and DH's colleagues who are another close group, but not likely to oversocialise. I had four weeks mainly 1-2-1 with my DM85, helping her through an injury. DS who was out and about while lockdown was lifted is now at university in another town 70 miles away. I go out to walk the dog and to the supermarket, for which I wear a mask and take all the sanitary precautions. Most of our friends are equally careful, or more so. But we are 60+ and cautious. Not stupid, nor easily panicked. Some of us are high risk categories, so we're not going to defy the rules either.
It will be boring, and everyone hates having life on hold or stop, but I think we older people have to step back from unnecessary activity and exposure to allow COVID to rip through the younger population who will mostly be asymptomatic if they get it in order to develop herd immunity. The NHS has now proved several interventions to mitigate the worst problems.
DMIL, 91 has multiple chronic illnesses including rapidly advancing dementia and while I love her to bits, she has written DNR on every document she's signed for the last 20 years, so she cannot be a priority for the NHS. Keep her comfortable, let us know in time to say goodbye if possible please, but use the energy and know-how to save a life that still has potential. Anyone between 40 or 50 should always rank above someone of 80 or 90 for medical intervention.
If you're in your 60s or 70s, then I think you should behave intelligently and with restraint. We are getting to the end of our utility economically. It really doesn't matter that you haven't ticked off everything on your bucket list. That's irrelevant. (If this seems hard, I have mostly lived in rural areas, where animals are bred to go into the food chain, and in inner cities, where violence was commonplace. Neither accommodates much soft fluffiness).