I actually sold my R5 to buy an R6 because 99% of the time, good 20 megapixels is preferable for me than 45 megapixels and at the burst rate that the R5 has, it was really hard to have shutter discipline, and I didn't need to be burning 5 gigs just to get some cat pictures. Plus, at the time, the R5 could be sold at zero loss because the stock was so low.
I'm amazed that people actually want 45 megapixels. My life is so much easier with 20 megapixels because images process more than twice as fast now, and upload times, upload bandwidth, and disk space needs are reduced by half. And it's still way more than I need. If you have a 6K monitor, you can actually see 20 megapixels, but how many people do I know with 20 megapixels? And I have a very modern computer that is faster than most people's computers.
I do wish that my R6 was 25.2 megapixels, by the way, which is the magical number it would need for the APS-C crop to be a 1:1 4K readout, but anything beyond that is so extra for me right now. I do think 30 megapixels would be a wonderful sweet spot for many, though, because it allows a little bit of cropping while still having way more resolution than necessary, but honestly, be careful what you wish for with numbers greater than 30. I had an M6 Mark II before this, and I always thought that the 32 megapixels just needlessly made the files bigger.