Most of the features that you point out are IO bound. E.g. indexing dependencies, navigating/ searching files. Are you sure that the speed up is because of the new IDE release and not because of a new laptop?
I'm sure it is a bit of both. I was using the Intel version of the IDE until the release today. It took a long time on my Intel MBP and it also took a long time on my M1 with Intel. The ARM version of the IDE is substantially faster, as it should be. I do realize this is an unscientific anecdotal account of the situation so YMMV.