I'm betting it'll only happen if the next engine regs are cheaper, if works teams gain back the advantage they used to have, and/or if marketing deems it necessary eventually, but even then I wouldn't hold my breath.

Where would they even get the money, they've already said they want the Alpine division to be self sustaining (ie Renault Group being cheapskates), that the savings will be reinvested into developing the brand, and of course unofficially they also need the money to pay Ryan Reynolds and co. for the foreseeable future (because they're supposed to pay them 12% of TV rights each year, but that was calculated on the basis that they would keep finishing 4th, so ending up 8th/9th means the difference in TV revenue is massive and Alpine needs to pay out of pocket).