At least the newest better 4 core Macbook Pro 13" are now beating the 2015 15" MBP in raw CPU power. I'm looking at (only) CPU benchmarks the recent years and for me it seems Intel was pretty much sleeping from around 2013-2017... maybe it was also their internal problems with going to 11nm and also lack of competition!

I think Intel could have stepped up their no. of cores with low thermal CPUs a lot sooner. The last radical step up from Intel was 2013 with Haswell CPUs and then after that 2018 with a more lower TDP 4 core CPU which we see now on the Macbook Pro 13".