I have a Deco XE75Pro mesh system fully functional (4 units).

I have ordered a BE63 system (3 units) which may be enough for my quirky house with multiple dead spots (hence the 4units)

I plan to power down all the XE75 Pro units and introduce the BE63's.

:

My questions are:

1. Is this the correct thing to do or should I just delete the XE75's from my account (not sure how).
2. Should I just start over as if the other units were never installed - see 1 above.
3. Depending on how good the BE63 coverage is, I may want keep 1 or 2 XE75's, since the specs say Wi-Fi 7 is backwards compatible. Even if the speeds would be slower, most of my 40 or  so devices are 2.4Ghz anyway.
4. I have all the hardwired and Wi-Fi set up as fixed addresses, so it would be great if I can just introduce the new router and satellites to replace the old devices.

Thanks