The current top results for single core performance are ~3,100 so it is, on paper, a substantial gain. The M3 in the iMac achieves around 3,053.
However, Geekbench is not that great (imo) so it does not necessarily indicate what you can expect overall performance to be or improve by between CPUs.
I do find my Macs increasingly difficulty to use, but like many things, Apple would consider quite a few of these features 'lost' as upgrades or part of the natural evolution of platforms. For example, getting rid of kexts is probably a good thing while the Settings app is straight garbage.
My time with PCVR streaming on the Quest 2 dramatically improved when I upgraded my wireless network, to the point now where I only wirelessly stream except for very high movement games e.g. F123. I thought there was nothing wrong with my previous setup and streaming (PlayStation and Xbox streaming included) was just terrible, but it turns out it was my setup all along.
This is the same for e-scooter rideshare schemes. Much of the evidence points to escooter use replacing walking short distances, so environmentally it can be a net negative overall.
And meanwhile, more and more USFF PCs will roll out into second hand markets, which offer a much more compelling option than the Pi, unless idle draw is your main consideration. Its an unfortunate state of affairs, and I hope a Pi 5 can come around soonish to reinvigorate this market.
I find it fascinating to see what the Foundation is turning its mind to now it has a seemingly high-volume, reliable supply of its house-design ARM chip.
I wonder if the future of Raspberry Pi products will be going even lower-end, rather than dealing with the complexities of making a competitive Pi n+1
However, Geekbench is not that great (imo) so it does not necessarily indicate what you can expect overall performance to be or improve by between CPUs.