I’m saying it’d be bloating the mod when it doesn’t need the feature.
The difference between Black Mesa doing the whole ‘press a button to toggle the graphics to the remake and back’ feature and Halo: Anniversary doing it is that Halo: Anniversary was a commercial game, so many people who bought Halo: Anniversary never owned Halo 1 beforehand.
It’s likely that almost every single person on these forums has already played Half-Life 1, and a majority of them have already beaten in.
In addition, Black Mesa changes up the level structure, architecture, and gameplay in such a way that it wouldn’t be as interesting (IMO) than Halo: Anniversary’s implantation of the feature, because Halo: Anniversary was little more than Halo 1 High Definition.
If you wanna see the difference between The Black Mesa and Half-Life 1, play both back-to-back, because there’s a lot of gameplay changes to witness as well.
Edit: I just realized I called ‘Black Mesa’ “The Black Mesa”. I’m keeping this mistake in, because I find it funny when an article is part of a thing’s name.