Well, 'high-end' has a new meaning-ish;
Since all your 'basic' Z / X boards will have >300W power delivery, at least PCIE4 everywhere, and DDR5, the only thing left to add are the luxury features, i.e. TB4/USB4 and 10Gbit, and overclocking / enthusiast features, like the post code display and onboard power and reset buttons.
You'll see the decent mid-range boards come with more headers for say temperature sensors, fans, water pumps, and some will have voltage measuring points for use with a multimeter or oscilloscope.
So a basic board will have everything you absolutely need. And in a lot of cases, that's also enough for most enthusiasts; you're simply not going to get much more than frustration trying to get any real performance from overclocking, while most boards of the Z / X lines support enough tuning to get a system to ~99%.