Switch 2 will be backwards compatible with Switch

And this reveals the real reason Nintendo came after Switch emulators - to buy some extra time before Switch 2 gets properly emulated.

The hard part of emulating the Switch 2 probably isn't going to be the actual emulation, but breaking the security so that the games and firmware can be extracted and decrypted. Nintendo pretty much nailed their software security with the Switch 1 but were undone by catastrophic hardware bugs, so we'll have to see how well they learned their lesson on the hardware front next time.

Microsoft and Sony have demonstrated that hardware security can be more or less perfected, neither of their systems have been compromised via hardware attacks for several generations now.

Microsoft and Sony have successfully prevented their systems from being jtaged or mod-chipped. Not sure you can prevent dumping the actual game binary on the internet. That has lots of software and hardware attack vectors and only needs to be done once by a professional enthusiast.