Well, you can blame the chipset manufacturer like Qualcomm for making the SD Gen 3 64 bit only. This change has caused a lot of software problems with much legacy software/hardware.
I know 8 years doesn't sound long, but the pace these mobiles have evolved since Android, that may as well be 2 lifetimes ago. Unfortunately you can't judge an office computer to these mobiles, as their shift in advancement is on a whole other level compared to most other tech industries.