“could have major ramifications for yeshiva parents”
There are only two other states with programs like Maine’s: Vermont and Connecticut. There are no yeshivot in Maine or Vermont. But a few yeshivot in Connecticut may benefit.
But there is a hitch. Actually many hitches. The programs require that the students be charged zero tuition. And the programs require that the schools follow state curriculum mandates and state labor law. Their teachers and nonprofessional staff are unionized.
The programs also have geographic limits.
And an even bigger hitch is that the schools participating in these programs have to accept all students. They can’t discriminate on the basis of religion. Nor can they cherry pick to avoid special education students. They have to be co-ed. Would the yeshivot accept non-Jewish students? There are Jewish schools in the UK, Ireland, and India (!) that do. (When I was in Ireland I had a Catholic cab driver who effusively praised the Jewish school where he was sending his daughter!) Would they allow co-ed classes?
The programs actually work pretty well. But it would be a dramatic change for yeshivot.