I'd probably look at all of those together. The chain matters because it affects the infrastructure underneath the platform, but the actual trading experience still comes down to things like execution, liquidity, fees and how custody works. EVEDEX is built on Arbitrum and focuses specifically on on-chain perpetuals, with self-custody and gasless trading as part of the setup. https://www.quicknode.com/builders-guide/tools/evedex-by-evedex.
I'm trying to understand what actually matters when choosing an on-chain perpetuals platform. Is the underlying chain a major factor, or should I mainly care about liquidity, execution and fees?