There's pretty good HLS tools and other things to work at a high level. The real difficulty is on verification, RTL synthesis, material checks, fast simulation, etc. Altium lacks a bit of these whereas Cadence is huge. That Mentor was so tiny in market cap despite having something good for every part of the stack, even software side, made them the best buy.

I have occasionally recommended Altium to people designing new hardware just because they have a nice cost/benefit ratio. So, did Tanner on PCB's and analog. Mentor bought Tanner. Now we're back to Mentor. :)