Fundamental difference between Canon EOS 7D and an EOS R8

I currently own an EOS 7D, which is a very nice camera but almost 15 years old at this point and a DSLR. I’m thinking about upgrading to a newer mirrorless model like the R8. Obviously they are quite different cameras (full frame vs APS-C sensor, mirrorless vs DSLR, a decade newer tech) but it’s hard for me to judge what that will mean for me in terms of my photo shooting experience and the quality of images.

I’m curious if anyone has experience with the EOS 7D and then upgraded to a newer mirrorless camera and what that has been like?