Disable deprecation log and TypoScript.strictSyntax check
Please disable deprecations at least for the production server, see https://blog.reelworx.at/detail/deprecation-log-handling-in-typo3-9/ and have a look at the errors in typo3_*.log. By scanning the log quickly I assume either setting TypoScript.strictSyntax
to not complain about the old syntax or fixing the syntax to use only the new syntax a lot of lines can be avoided: https://docs.typo3.org/c/typo3/cms-core/master/en-us/Changelog/9.5/Deprecation-86068-OldConditionSyntax.html
89K Jan 22 15:47 deprecation_080cc61ee8.log
17M Jan 22 16:14 typo3_969f7be212.log
31M Jan 22 16:14 typo3_deprecations_969f7be212.log
Related to t3o/typo3.org#460