some extensions are supposed to not be supported in the future, causing a problem- but we are not told which extensions, so how can we contact a manufacturer about it? Why are we not told which ones?
MacBook Pro 15″, macOS 10.15
If it's a third party app, it won't work in Big Sur. So, all of them.
Because kernel extensions tie directly to the OS at the kernel level, a poorly written extension can destabilize the entire OS. Malicious kernel extensions can do just about anything they want since the kernel is at the root of the OS. Kicking all .kext files out removes these problems.
All vendors must now use Apple's EndPoint Security layer for apps that need continual access. Mouse, tablet and keyboard drivers being the most common, but there are more. Works somewhat the same as a kernel extension, but does not have as deep of a connection to the OS as the older .kext method.
The macOS product team probably knows why they chose not to identify the kernel extensions in Catalina, that will not be allowed in macOS 11 (Big Sur). As we are fellow users, and the product teams do not participate here, we cannot speculate on their reason.
You can provide direct feedback to the macOS product team, but do not count on an answer.
What extensions will become a problem to apple's system?
