Mental staleness/fatigue likely as much an issue. Not everyone likes playing/thinking about football for 12 months straight without a bit of a break.
It's the reason some of the Weenix guys (and I think AFC II) got a month long break around July this year, before starting to prepare for the U20 WC in Chile. Those that had been around the Nix/AFC first teams last ALM season, could have gone through nearly 18-24 mths of continuous football training (if not playing). At some stage you just need time away from the game.
Still this new OFC League is an exciting first pro opportunity for many guys, so that in itself will be a powerful motivator. Plus travelling off to exotic locales like Suva, Honiara and Port Moresby.
But you'd imagine when this OFC Pro League finishes, a few might need a few weeks break before finishing the winter season at their domestic NZ clubs.
The ALM being a spring-autumn comp, OFC League being summer-autumn, and domestic leagues being autumn-spring, make our part of the world a bit unusual compared to say Europe where all league tiers basically have the same off season timeline.
The National League going to a Nationwide (12 team?) winter league format from 2027 (finishing September?). That should sort of make the season a bit shorter ie an off season break Oct-November, before the OFC League guys start training again in December for a late January kick off.
Sounds like in 2026 AFC might effectively have a AFC III team playing Northern League.