The SAVETRD refactoring and "&" for sector-append of files is now at master branch in github.
If you are using SAVETRD in your projects, testing them now would be nice to catch any regressions before the v1.15.1 will be released.
(for example how to use the "&" check "tests/misc/trd/savetrd4.asm" or "docs/documentation.xml" (html is not updated yet)).
(of course you must build sjasmplus from the latest sources to have the new SAVETRD implementation)
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I don't understand what's the point of either adding lame sub-par limited feature in days/weeks of work (and that's still too much time), or trying to compete with excellent SW which already exists (sed/m4/awk/... all of that available everywhere, with years of expertise and know-how baked into them) - that would eat probably months/years of my time, completely wasted on something what I can run in 10 seconds.
So far I have seen no factual justification for such demand (and I would be very surprised if you would come with something meaningful, because I can't even imagine anything reasonable).

