Lean towards RF but there's Merritt in both approaches depending on the situation.
With the number of sets I own even wired RF with cheaper cabling is wildly impractical save for a few sets so most of my collection gets signal from a cluster of BT modulators feeding tuned dipoles with enough TX power to cover my block.
On my 21CT55 I was leaning towards going with video input (I built and successfully tested the tube amp box for it) until I found I could get the reciever chain to pass color and work by adjusting the osc slugs for each channel.
Last year me and a friend bought and split up a 17" predicta...my friend wanted the tuner (the one in his was wrong and shot) and speaker and the rest became mine....I mixed and matched with my keeper and ended up with one with good RF and cosmetics and a second ugly one with no tuner that I converted to a monitor to sell (sweep would die after a few minutes so it wasn't exactly a great set).
I have an RCA TM21, Contact CYB, and 3 other tube Broadcast/industrial monitors that never had RF/IF/Audio....I do have one IIRC conrac tube rack mount tuner and a HH Scott lab grade rack mount tube amp, but that isn't enough to go around.
I also have some tube Setchell Carlson and Admiral School TVs/monitors that can take either input.
Then there's installing an input just for the fun of it...some sets are just asking for an input such as a early 50s RCA that has an RCA audio input and an RCA jack marked video....That set needs an input so that jack can live up to expectations.
TLDR version: it is nicer to have RF but sometimes you gotta do what you gotta do to get/keep a set running.