Top Three things to consider before upgrading:
1. Same Design? No need to Upgrade
2. Almost Same Speed? No Need.
3. Almost Same Features? No Need.
In Asia people are wise, they wouldn't upgrade to a newer Product not unless The design has also changed. If iPad Pro get redesigned in 2022 or 2023.. and you upgraded to 2021, people will still think you have an older model like the 2018 because of same front bezel design..
I don’t think this type of hollow consumerism that buys a new iPad just because the design had changed a bit is a thing, but . there are of course extreme cases. I bet most will be used at home anyway, and if not, the majority won’t care what model tablet a stranger carries around with them.