The Meta compiler needs to report any occurred errors. In unfortunate cases, they can still be errors in the REBOL code. Oldes' version puts ANSI codes in the output, which I cannot report to all Meta platforms
Perhaps they can be switched off somehow, I didn't look very hard for that. Carl's version is usable so far, and faster
There's also a dialecting regression in Oldes' version. I forgot exactly what it was, but I think it was imported from Red
The ANSI codes are hardcoded now.. because I need colors and I was not aware, that there is anybody else who may be still interested.. it should be quite easy to add a compilation config swich and turn it off from the C sources.. It would be hard to turn it off from Rebol side as I use it on many places quite a lot. But it should be also possible.. as it is mostly inside help module and system logging functions, which may be able to filter out the ANSI codes in one place.