Thank you for your personal take. I've been using the KeyScore application with an Ipad 9 which uses the microphone to follow and turn the page.
I'm just not sure when it comes to the Ipad Pro how well the processor will work with IOS 15 and 16. I know the M1 is alltogether different experience.
I'm not sure what I can do about the battery life situation, be prepared to replace..
I downloaded the app and wow, how is this app free? It looks great! Moving to 12.9 will be a huge upgrade vs the iPad 9 size. In terms of speed the 3rd gen is basically on par with the iPad 9, it even has more RAM.
I am not sure what worries you about the microphone. The 2018 works with iPadOS 15 just as well as it worked with all the previous versions, not any slower at all. Justs reloads more, but if you use the iPad 9, that one reloads even more.
Honestly outside reloads the speed difference with the M1 is barely noticeable (very noticeable instead vs the original iPad pro).
The 2018 iPad pro is still an amazing device, even today. If it had more RAM I wouldn't have bought the M1 (mini led is not something I care about)