I don't believe the sprockets and sprockets-rails maintainers (actually it's up to the Rails maintainers, see rails/rails#28430) currently consider it broken. (I am not a committer/maintainer on any of those projects). So there is no point in "waiting for someone else to fix" it; that is not going to happen (unless you can change their minds). You just need to figure out the right way to use sprockets 4 with rails as it is.

And we shave off 6 or so seconds, that is huge.

Since the common problem with concatenating JavaScript files is the lack of semicolons, automatically adding one (that, like Sam said, will then be removed by the minifier if it's unnecessary) seems on the surface to be a perfectly fine speed optimization.

At work, I cannot maintain this project. At home, I'd rather spend time with my children and on projects that I'm currently passionate about.

Unless we choose to use the semver ju-jitsu of calling the changes a bugfix

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