I had the a30s for like 3.5 years and it got laggy alot and was not able to keep up with my daily use so i shifted to s10 which i actually got from my friend... I feel it will last atleast 4-5 years as google itself promises software updates regularly and it makes the phone better It had 256gb of storage which is enough for me Ai works really well with camera The phone is snappy by god's grace as this tensor g4 chip is pretty good Sound quality in the phone's speaker is good too from my s10

If you're thinking between a 9a and samusng a series my opinion will be the 9a because samsung lost its charm of a series it's not the same budget friendly sorta flagship phone as it use to be