> I find that conventional commit wastes space in the summary for little gain

The things that conventional commits adds to commits were intended to be accomplished by commit trailers (Co-authored-by, Signed-off-by, etc.). Nobody is stopping anyone from having a “Change-type” trailer and a “Product-area” one too. You can have these in a template on your machine so it’s the same amount of typing involved. You can even tack on `--trailer` to `git commit` if you insist on using `-m` for everything and never filling out the commit body (commits devoid of detail are another plague on repositories).