Yeah if the Switch has a significant future beyond its replacement, it's as a budget product to ensure kids from low income families are still growing up with Nintendo's IPs even if their parents can't afford a Switch 2.
To that end, I expect the OLED will get the axe in relatively short order, (as the premium slot will be filled by the successor) while the Lite, maybe the base, and maybe a new Wii Mini/New 2DS type model are kept around until the Switch 2 Lite can arrive to fill that lower priced niche.