TVL is not the best metric for Serum - what really matters is transaction volume. My understanding is all open orders and unsettled trades are counted as Serum TVL. No one wants to hold a long standing open order on Serum because this money can be used in borrow-lending protocols.
I think we can’t compare Serum to AMMs because AMMs are inflating their tokens by issuing so called “rewards”. Serum is so far deflationary because of token burns proportional to transaction volume.
In my opinion Serum business model is more sustainable than AMMs business model which is not sustainable long-term because of inflation which attracts users/volume.
AMMs were created because of technical limitations of Ethereum. I can’t understand why so many projects are trying to copy AMM logic to blockchain which is not constrained by Ethereum limitations.
What we should focus on is to increase transaction volume - we need something like 3commas for Serum DEX (with super simple interface) to allow retail investors to engage in market making using simple strategies like DCA.