Btw the OP_RETURN limit will not be overridden with the new default, so if you use a 83 byte limit, Core 30 will also use the limit from 83 bytes.
quoting⚠ BITCOIN CORE v30.0, PLEASE READ ⚠
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HOW TO INSTALL?
1. Stop Bitcoin.
3. Download "bitcoind.s9pk" from the bitcoin-core-startos Github release page. https://github.com/Start9Labs/bitcoin-core-startos/releases/tag/v30.0
4. In StartOS, navigate to System -> Sideload a Service
5. Upload bitcoind.s9pk
WHY DOWNLOAD INSTEAD OF MARKETPLACE?
Knots and Core share the same ID. This allows dependent services, such as lightning, to use either one. It also allows people to switch between them without needing to resync the blockchain.
Due to a bug in StartOS 0.3.5.1, if either service goes up in version, it will show as an "update" for the other service. This sucks and has caused people to think StartOS is trying to trick them into switching. To minimize confusion and mistakes, we release new versions of Knots and Core in parallel and require explicit action for switching. Not ideal, but a decent stop gap until StartOS 0.4.0.
Because there is no Knots v30.0, listing Core 30.0 on the marketplace would result in Knots users forever seeing Core v30.0 as a "update". As such, we are making Core v30.0 available as a download/sideload instead of listing it on the marketplace.