@jvonau & All:

I don't know all the ramifications but rfkill unblock wlan saved the day installing the latest IIAB onto Mint 21 on an Acer laptop (TravelMate P643-M).

What might be the best way to make this happen for new implementers in general?

ASIDE: iiab-diagnostics appear a bit odd as this is a continuation of an IIAB install someone apparently began 2 months ago: http://sprunge.us/rjTcse?bash

Tangentially Related:

• Networking refactoring & similar efforts #3264
• mongodb/tasks/install.yml: Force libssl1.1 on is_linuxmint_21 too (for Sugarizer) #3397