What preventing you from upgrading to M1?
The answer is simple: The M1X and M2.
And
At least 16 power cores
At least 64 GB RAM (better 128 or 256 GB RAM)
DDR5 RAM and not the old DDR4 RAM
At least 8 TB SSD (better 16 or 20 TB SSD)
Even the old 2019 MacBook Pro 16-inch had 64 GB RAM and 8 TB SSD and I do not accept a downgrade.
Especially not with Apple products.
PCIE 5.0 and not the old 4.0
Doubled GPU cores
Doubled Neural Engine cores
5G
120 Hz ProMotion Display
Up to 1600 Nits
4,5k or 5k Display
Much better support for high end monitors.