I would like an EASA licence so that in the event of no agreement between UK and EASA I will still have the option to apply for jobs all over Europe rather than just UK. In this climate I would like to improve my chances of getting employment and in my opionion having an EASA licence vs UK national licence gives that.
For reference, converting to IAA is not based on any airline but instead because it is the obvious choice for a UK national.
As for the discussion of where UK passport holders will be able to live in 2021, that is a completely different topic which could have an inconsistent outcome to that of the EASA licensing debate.