My Samsung 4k bought only last year has component and rca. Its a shared port but does both. So component is not dead yet.
go to best buy's website. Find 4K UHD tv's and check off "4K" under resolution and "samsung" under brand. scroll down to inputs/outputs. you'll see 20 sets available with component. 45 with HDMI, which means 25 are HDMI only, including the $20K 88" model.
Component is dead yet, BUT All content providers are trying their damnedest to kill it. They only want TVs with HDCP.
Plus there is a a bandwidth issue - You need HDMI for 1080p or higher.
When was the last time you saw a new TV add-on (roku, firestick etc) with component? Usually its HDMI and maybe composite.
Note: some stuff - like tivo - has pain in the ass adapters that let you use component.
So component isn't dead yet, but its laying on the dock gasping for air as the fish hook is being pulled out.
Edited by H454, Sat Aug 12, 2017 9:59 PM.