In 4 years vs the 2018 iPad Pro Apple
#1. Doubled the RAM and speed LPDDR4 to LPDDR5
#2. Added WiFi 6E and Bluetooth 5.3
#3. Took the CPU from 2.4Ghz to 3.4Ghz
#4. The GPU alone is 40% Faster vs the 2021 M1 iPad Pro and 200% faster than the 2018
#5. Doubled the Storage space 64GB to 128GB and it’s twice as fast NVME
#6. Added Thunderbolt 4 vs just USB-C Gen 1 speeds
#7. Massive camera improvement vs the 2018
I could go on I daily drove the 2018 iPad Pro 4 solid years it got me through the pandemic. And it was getting sluggis. The 2022 M2 is refreshingly snappy.
I think these improvements may matter or not depending on the person:
#1. Doubled the RAM and speed LPDDR4 to LPDDR5
That's by far the biggest deal, unless you got the 6GB version, which I did for the 11" but not the 12.9"
#2. Added WiFi 6E and Bluetooth 5.3
BT 5.0 (from 4.X) was a big leap in terms of range, I haven't seen much difference with subsequent versions. As for 6E it's nice for the future, but currently 6E routers are too expensive, so makes no difference to me
#3. Took the CPU from 2.4Ghz to 3.4Ghz
That's a nice improvement, and the main reason why M1 is faster than A12X despite having the same number of cores. However A12X is still far from slugghish unless RAM is bottlenecking it in the 4GB version. CPU speed is definitely not a bottleneck of the A12X (video exports have not improved dramatically on my M1)
#4. The GPU alone is 40% Faster vs the 2021 M1 iPad Pro and 200% faster than the 2018
I don't make much use of the GPU, as far as I can tell
#5. Doubled the Storage space 64GB to 128GB and it’s twice as fast NVME
I never buy 64GB. Speed actually depends on size. So if you compared 64GB with 128GB it might indeed be twice as fast. On the contrary my 1TB A12X is almost as fast as my M1 128GB.
#6. Added Thunderbolt 4 vs just USB-C Gen 1 speeds
It's gen 2, not gen 1 in the 2018, and again TB drives are so expensive that I don't have any (I think most people, including most tech nerds, don't use TB drives because of price) and from the tests I have seen the TB speed is quite a bit lower than on Macs
#7. Massive camera improvement vs the 2018
I don't use the iPad camera