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Using DFU Bootloader with an application on a newer SDK version

Hello,

i am using the DFU Bootloader from the version 15.3.0 of the nrf connect SDK with the softdevice version 7.0.1 on a nrf52832.

In Addition i am using a modified HID example from the 16.0.0 nrf connect SDK where i manually added the DFU functionality.

So far everything was working, yet i was wondering if there could be any negative effects with this combination:

1. The bootloader from an older version of the nrf connect SDK, than the main application

2. Using the softdevice version 7.0.1 which apparently isn't supported on 15.3.0

3. Should i downgrade softdevice to version 6.1.1 which is compatible to both SDK versions if point 1 wont cause any issues?

Greetings