I don't have a dream lens list. The lenses I have cover about every circumstance that I am likely to face, other than those best taken with tilt-shift lenses. If I know those occasions are coming up, I can always rent one of those lenses. Earlier in the pandemic times I rented the 24mm for ten days and a month later the 17mm for a couple weeks. They were fun to experiment with, and now I have a better sense of how and when to use them. I concluded that I wouldn't use one often enough to splurge on owning one. I guess if I had a lot more money, I would buy the 24mm to sit on the shelf until some use came to mind.
As it is, I have excellent L zooms on the wide and telephoto ends, a kit 24–105mm for the middle, and several prime lenses for special use, including the 100mm non-L macro. I don't shoot things that some of you guys do, so I don't have need to cover those situations. While I enjoy the aesthetics of owning nice glass, photography is still more my hobby than is buying photography equipment. I do have occasional bouts of GAS. Last week I was pricing star tracker drives. The reality is that I have an 8" telescope that I haven't taken out of its trunk since I've lived here. It was fun back when I lived out in the country and had dark skies. The old clock drive on it is probably not too accurate any more, and the tilt angle is sort of a coarse adjustment. But I still got some decent shots of Jupiter and the moon in film days. If I lived in a less light-polluted place, I'd be tempted to get new gear for that. I haven't even tried to see whether my old Canon telescope adaptor will work on current cameras. The mounts seem similar enough that it might.
When Halley's comet was coming around these parts, I lived in the middle of nowhere between dairy farms. I would take my binoculars out each night and see it, but also look at other things. The Pleiades were spectacular through them, like hundreds of little jewels. I looked at Jupiter one night and saw three little dots near it. I was skeptical, but I looked at a chart in an astronomy magazine, and yes, three of the Galilean moons lined up as I saw them, and the fourth was obscured by the planet. Jupiter is very bright right now and conveniently in the south at decent hours. I took out the binoculars and looked at it. I don't think I am very shaky for an old guy, but I could not hold them still enough to get a good view.
So maybe my next equipment decision is what if anything to do about astronomy, viewing or photographing. Maybe I already decided not to bother.