industrial metal = industrial + metal, i think that was pretty clear. there is lots of industrial metal bands, but i guess in your "book" they are not metal.ahah they just happen to have metal in the label...a coicidence.
Spiral Architect is tech metal, just ask the guys, you got a forum here to do so. or just read some topics there, they explain pretty well why they are tech and whats tech metal.
blastbeats on i? you can go listen to it all you want, no fucking blastbeats at all. fast drumming does not equal blastbeats, you should know it. go listen to it.
actually the "melody theme" behind the riffs in catch 33(in most meshuggah albuns they use those "melodies" behind the riffs, standard meshuggah) is played tremolo yes, but in a very diferrent fashion from death metal. it's just a way of sustaining the notes longer and doing that mesmorizing hipnotic feel, that "crazy" ambience, not death metal at all.
many solos have tremolo, classical music,jazz has lots of tremolos like any genre can have them (even pop), that is not the point, the point was the tremolo picking cliche in death metal(i guess you didn't get that, do i need to draw something?), fast melodies played tremolo style like vader, morbid angel for instance. meshuggah does not, or ever used such a thing. meshuggah has never had any elements of death metal in their sound, you can read interviews with the band, search all you want, there will not be one person in the world that would say to you they are death metal (just that ozzy kid lol)
slikpnot however when use tremolos , they use it in a death metal way(as a gimmick you might say but they use them), they don't use it often thats true, but again just an example, i didn't say they were death metal, i said metal.
i just pointed out meshuggah as an example, you said they were death metal, and that was hilarious, of course i had to say something about it.
you still haven't explain me why meshuggah is metal and slipknot isn't, nor you have explained me what makes a band metal, cuz i don't get you concept and many here seem to not get it either.
like TylerTheNuke said, slipknot definetely is not purely metal, but many bands nowdays aren't but are metal enough to be called metal.
things got to involve, we can't all be playing like iron maiden to be pure metal.
you have said that black sabbath, pantera are hardly metal, man your metal definition is pretty strict. if those palm muted riffs, the use of that diminished fifth(like in the song black sabbath which is fucking evil) are not metal what the fuck is for christ sake?....
and no one is sticking with me because they know me, i don't know anyone in this forum, i don't post here that often, actually i am now. go figure.