I believe the anti-N reg movement was largely driven by EASA/EU bureaucrats….they got as far as requiring EASA licenses (in addition to FAA certificates) for EU resident pilots flying N reg aircraft in the EU….but they never got as far as time limiting N reg aircraft in the EU (except some individual member states like Denmark)…. Now that the UK has left the EU and EASA I would not expect any pressure on N reg for UK residents… just my generally uninformed and possibly not up to date opinion…