Ya before I bought my C1 I watched a ton of reviews online and was worried it would not be bright enough. The brightness is ok but for my next I would like it to be a bit brighter. Apparently a lot of the newer OLEDs are getting brighter. That's a another reason why I chose this TCL for the bedroom, it gets nice and bright. Lots of other budget TV's don't.
I would actually consider a Mini LED because I have a Macbook pro that uses a Mini LED and it looks amazing. Plus no risk of burn in unlike OLED but apparently that is becoming less of a concern unlike the OLEDS from like 4, 5, 6 years ago.
To be honest, I don't know if there is much of a future for Mini LED. As OLEDs get cheaper, brighter and more burn in resistant, I think they will become the norm for premium and even mid range tvs. You see this with laptops as well, tons are using OLED.