I've been telling people since at least early 2019 not to buy 2 GB iPads if they could afford to wait a while. The usual response was basically that Apple is magical and iPad OS doesn't need more than 2 GB.My iPad is still snappy, probably due to how great the A10 is, but yes in RAM related tasks, it has limitations. Would not invest in 2GB in 2020.
What a difference 1 year makes.
BTW, iPads went to 2 GB all the way back in 2014. If anything it's impressive that 2 GB iPads have done this well for so long, but times change.