I have been doing E2E testing exclusively for close to a decade on several apps and it works great. Note, not integration, E2E. I can go from bare vm to fully

I have been doing E2E testing exclusively for close to a decade on several apps and it works great. Note, not integration, E2E. I can go from bare vm to fully tested system in under 15 minutes. I can re run that test in 1-5 (depending on project) ... Im creating 100's of records in that time, and fuzzing a lot of data entry. I could get it to go "even faster" if I went in and removed some of the stepwise testing... A->B->C->D could be broken out to a->b, a->c, a->d. Because my tests are external, they would be durable across a system re-write (if I need to change language, platform etc). They can also be re-used/tweeked to test system perf under load (something unit tests could never do).