> LCDs with HDR come close to CRTs.
This is pretty meaningless and conflating gamut with dynamic range. The vast majority of CRTs back in the day would be driven with 8-bit per channel RGB DACs, so not HDR, and most CRTs would have an sRGB or similar gamut (so not a wide gamut). It is true that both the dynamic range and gamut of cheaper LCD panels is pretty poor (~5 bits per channel) and not even complete sRGB, and this set the tone for many low cost TN displays of the early 2000s (and still adorns the lowend of laptops and even some Thinkpads to this day).
However affordable LCD monitors have been around for YEARS with wide gamut (ex Adobe RGB or DCI-P3), superior to all but the most expensive reference CRT monitors that virtually no one owned, and long before HDR becoming commonplace. I bought a 98% Adobe RGB monitor about 14 years ago for less than $800, color reproduction and contrast wise completely blowing any CRT out of the water I ever owned. But even a cheap <$300 IPS display on sale for the past 15 years including all MacBooks will exceed most CRTs as well. In practice CRTs also have middling contrast ratio as well unless you work in a pitch dark room, which almost no one does.
> I remember vividly my first LCDs who were marketed as 24 bit
IPS and true 8-bit TN panels have been mainstream for a long time now. Nothing to do with recent uptake of HDR.
