I got my dad an x-t20 after he struggled with an olympus e-m5 mkII for long enough that I got sick of him complaining about how difficult it was to use. I'm currently using an x-t1, my second one, and I originally planned on buying the x-t10 but it was out of stock everywhere in Melbourne last year.
I think they're great little bodies - minimilist and well designed, tiny, and same IQ and basic AF as the x-t2. I would probably ask myself if the x-t20 is worth it over a x-t10 which can be had really cheaply at the moment. Biggest advantages are better video, slightly better sensor and the ACROS simulation.