RIPE NCC's available IPv4 pool will not be empty everytime (addresses are de-registered by lack of payment, closures, ...), so a complete and *permanent* "run out of IPv4" is highly unlikely.

ARIN style never-ending queue that basically means you will never get the addressees you request at this stage is synonymous with a complete and permanent run out of IPv4 to me.

You can also observed that, for example, US where they observe a “complete and permanent run out of IPv4” has more IPv6 traffic, according to Google, already than say UK where the national ISP, BT, and majority of alternative ISP supports IPv6 for ages already, out of the box.

No access to V4 - better incentive to have eyeballs on V6 (and granted, some CGNAT probably too). More eyeballs on V6 makes an incentive for content providers to make more services available on V6.

That’s my take on it.

RIPE NCC's available IPv4 pool will not be empty everytime (addresses are de-registered by lack of payment, closures, ...), so a complete and *permanent* "run out of IPv4" is highly unlikely.