@quanin @cachondo The one that comes to mind is the table block, although it may have been fixed. The bigger issue though is that while the default blocks that come with WordPress may be totally accessible, (and "may be" is doing a huge amount of heavy lifting here), third-party block collections are an entirely different story. And the major advantage to the block editor is that third-party blocks can be released/shared/whatever, with the usual no checks on accessibility because decentralized ETC., which is definitely creating way bigger issues than, say, TinyMCE having an issue that then needs to be fixed. And switching to the code editor isn't really a solution since there are blocks for which you need to change settings/set options/configurations.