Anyone who bought a 4k TV in 2013 or 2014 was naïve not to know that HDCP 2.2 and HDMI 2.0 had not been finalized and were not both included in their sets. I bought a non-compliant Samsung in 2014 because I knew that I could update the hardware to 2015 with an Evolution kit. I did that with the SEK3500 (with a great Black Friday deal) and now my TV is compliant and faster. Your beef should be with the TV manufacturers that did not provide an upgrade path.
"naïve" or "ignorant"? I was looking at Panasonic's web site at their current 4K offerings. There's not a single mention of the HDCP version used (I checked the "features", I've check the "specifications", everywhere.) And how many TV manufactures actually update their firmware once the new model arrives? I have owned a lot of "smart TVs", but getting new firmware or app updates once the new replacement models arrive is unheard of.