Unfortunately, nextion displays are junk in several aspects:

1. Low display brightness, bad viewing angles, zero daylight visibility, bad contrast. Can't be compared to OLED in this field. And who needs "ease of programming" (which is very questionable), if you can't see the result?
2. Their IDE is written with left rear feet and has appropriate usability.
3. Price? Above mentioned 1602 OLED module costs $9. I'd love to have Nextion for that price.

All above is based on personal experience with nextion displays, not other's ideas or impressions.