$ETH economics look bleak, here's some numbers from the past year
L2 networks generated ~10x more profit than Ethereum L1 generated in blob fees
L2 networks had an average 80.7% profit margin ($139M in revenue - $28.6M in L1 costs = $110.4M in L2 profits)
Ethereum L1 made only $12M in blobs fees from L2s (~$16.6M in settlement fees)
@base was the most profitable L2, with a profit margin of 93.9% ($80.4M revenue - $5.2M L1 costs = $75.2M profit), accounting for 68% of all L2 profits
Ethereum L1 charged $16.53/MB for DA blobs (708GB for $12M in fees from 31 protocols)
While @celestia charged only $0.09/MB for DA blobs (2.53TB for $234K in fees from 22 protocols)
In effect, Alt DA was 180x cheaper than Ethereum L1 blobs
Obviously these are all backward facing numbers, and the future could look completely different
But these L2 margins are not looking favorable for the L1 and altDA will only continue to get more competitive