The X-T20 and it's sibling, the X-E3 are Fuji's middle of the road models and considering that they cost half as much as Fuji's flagship models, you can't expect to see every feature released for the X-T2 and X-Pro2 to show up in the X-T20.
If T20 and E3 excluded from fuji's software support - it's not "every feature". It's excluding cameras from basic support. You can't excuse every Fuji's fail with non-flagship cameras with "you can't expect".
what do you call 'basic.?
I just updated the firmware in my xt20 and was hoping something would be done with the metering; I find if I meter on a highlight, the rest of the image can go very dark or if I meter on a darker area, the rest of the image can get blown out which didn't happen with the xe1, xt10. Shooting in AP isn't possible in some situations so I'm forced to use manual which I don't mind doing, but it's perplexing how the metering severely overcompensates during the process of metering the high and low lights.