My positive experience with NextJS by VC backed Vercel ($2.5bn valuation) makes me not skeptical of a package by mere nature of it being maintained and marketed by a for profit company with heavy VC investment.
Its all about how it integrates and how it avoids vendor lock in.
I feel differently about next.js after their latest shenanigans. Their end goal clearly seems to be vendor lock-in to the Vercel/next.js platform, whichever way it ends up happening. The current attempt looks to be to tweak and assert control over the React library, to make it Vercelified.
Its all about how it integrates and how it avoids vendor lock in.