Last time I tried them discovered source generators in the current .NET 10 SDK are broken beyond repair, because Microsoft does not support dependencies between source generators.
Want to auto-generate COM proxies or similar? Impossible because library import and export are implemented with another source generators. Want to generate something JSON serializable? Impossible because in modern .NET JSON serializer is implemented with another source generator. Generate regular expressions? Another SDK provided source generator, as long as you want good runtime performance.