Seriously this is true... the Tim Cook era has seen memory and storage capacities stagnate.
Just look at historic timelines of increases and you can see that pre-Cook they doubled more quickly:
Looking just at the base model iMac.
Steve Era: (Every 2 years memory and storage doubled)
1999: 10 GB Storage - 64 MB RAM
2000: 7 GB Storage - 64 MB RAM (Price drop year)
2001: 20 GB Storage - 128 MB RAM
2002: 40 GB Storage - 128 MB RAM
2003: 80 GB Storage - 256 MB RAM
2004: 80 GB Storage - 256 MB RAM
2005: 160 GB Storage - 512 MB RAM
2006: 160 GB Storage - 512 MB RAM
2007: 250 GB Storage - 1 GB RAM
2008: 250 GB Storage - 1 GB RAM
2009: 320 GB Storage - 2 GB RAM
2010: 500 GB Storage - 4 GB RAM
2011: 500 GB Storage - 4 GB RAM
Tim Era:
2012: 1 TB Storage - 8 GB RAM
2013: 500 GB Storage - 4 GB RAM (Education initially later everyone for a lower price)
2014: 500 GB Storage - 8 GB RAM
2015: 1 TB Storage - 8 GB RAM
2016: No iMacs
2017: 1 TB (or Fusion Drive) Storage - 8 GB Memory
2018: No iMacs
2019: 1 TB (Fusion Drive w/ 32 GB Flash) Storage - 8 GB Memory
2020: No small iMac (5K updated)
2021: 256 GB Storage - 8 GB Memory
The Tim Era is one of stagnation. The switch to all flash in 2021 might normally excuse a drop in capacity but it should still have dropped to around 512 GB since the iMac in 2017 had 256 GB of flash storage option and he couldn't even be bothered to double that with the base M1 iMac ...
There is a stark difference between the Steve and Tim eras.