Would you rather buy a used Gen5 or an M1/ M2 Avinox in say 3 years?
If you have common sense, you'd say the Gen5.
It's about long-term parts and service availability. Not to mention just overall reliability.
I suspect that as the product turnover at Avinox is very rapid, and obtaining service or replacements on older generation products becomes all but impossible, you'll see a corresponding drop in the value of these products on the used market.
How many M1 owners do you think are really going to be able to upgrade their motor to M2? So many of them want to yet none of them have done it successfully for example, yet these products are all but new.
Imagine comparing a used Gen 1 Amflow with an M1 to say a used Vala with a Gen5, in 2028. You'd have to be insane, or be buying it for next to nothing, to choose the Amflow.
PS. New Amflows PL Pro for sale for $2.4K in NM, USA btw. Seems to be a well established poster, but I'm not advocating.
https://www.mtbr.com/threads/dji-amflow-pl-carbon-pro-emtb-2026-800wh-e-mountain-bike.1245955/