Magento 2 provides many settings and tools that you can use to improve response time on the pages as well as provide higher throughput. Configuration best practices
Try rebase. If that dissolves into conflict-resolution-hell then give up, merge master into your branch and move on.” ~ Tim Abell Should you rebase or merge to update feature branches in git?
Name in Layout xml is required for cacheable=”false” to disable Full Page Cache in Magento 2.3.5, if miss name, the page cache will hit even though we used cacheable=”false”
I create a module which allow simply selecting existing simple products manually without having to generate configurable to see the link ‘Add Products Manually’. See here: https://github.com/PiscesThankIT/ThankIT_ConfigurableWizard
Check your DB. There is a table called theme that stores a reference to all the themes that have ever been installed in your store. If the type of the theme is set to 1, that means Magento sees the theme are virtual (what ever that means) and will no longer load your xml files. If that is the case,