The only way to keep the current motherboard is 7700K, but that's reall not worth the upgrade over 6700. You will need a new motherboard. You can get intel 12 and 13th gen or Ryzen 5000 and still use DDR4 RAM, but only if your RAM is at least 3200MHz CL16. If your RAM is slower, then you would've be getting the full potential of the new CPU. And in case you need to buy new RAM, you might as well get DDR5 since it doesn't really cost much more than DDR4, and you can get Ryzen 7000 series CPU.
If you're getting intel 13th gen, make sure you pick the correct motherboard with the right RAM support, while CPUs support both kinds of RAM, the motherboard will only support the one kind it's designed for.
I cycle for adventure and experience, it's also why I prefer gravel and offroad cycling to road. That gravel crunch in the forest, smell of the trees, sound of birds and absolutely no traffic is pure bliss. Ok sure there is some suffering during climbs, but the feeling of accomplishment when you finally get on top and the descent that follow are worth it.
I join one gravel competition a year, but I go for the event, not to actually compete. I like riding with one friend, on paths where we can ride side by side and chat, and I don't see a point in group road rides where you just stare at the butt of the rider in front of you the entire ride.
In general I experience joy the entire bike ride, it's like my therapy, a couple of hours without a phone, outside, just me and silence. I guess the fitness that comes with it is good too.