Aphex Twin

17:41 mins into the video you can very clearly see him using ableton 8 as a sequencer / mixer

In these archived screenshots from the comments section of Aphex Twin's Warp/Bleep storefront, you can see Richard James (aka Aphex Twin and like 10 other aliases) discussing the merits of PlayerPro Tracker vs. Renoise. This storefront went live July 21st, 2017, and these conversation screenshots were posted 2 days later on the 23rd. In the discussion, James (using the alias "daddy1") details his criticisms of Renoise and mentions feature-requests he's made to the Renoise development team.

"I've tried in vain to make the Renoise coders listen [to my feature requests], help!"

"[In PlayerPro Tracker] You could print plugin effects directly & destructively onto the sample, hence freeing up CPU, but you could hear the effect first before you printed it. I've really pecked several people to do this and it did finally get done in Renoise."

Those doubting that "daddy1" is Richard James can also take a look at this interview from German magazine SPEX, October 2014 issue:

My five-year-old son has now made six tracks using the Renoise software, and I think it’s better than my own tracks. When he made his first track, I thought it was incredible, but then he produced five more and I was like oh shit"

This is Richard's son using Renoise, not him, of course, but the odds that a 5 year old was allowed to research, install, and purchase a DAW without parental intervention/influence seem pretty low. I'm sure the Richard James household hosts many DAWs, but Renoise is the one with the most supporting evidence.

Pro Tools can be seen on RDJ's computer in this picture.

Aphex Twin (Richard D James) on at least 4 occasions has mentioned the use of Tiger Club in his early works. 3 mentions in 2015 on tracks he uploaded to his SoundCloud account user18081971, tracks: 13 high hats tune tamclap orig, 33 synthi rhy [q], tigercubdelay. And then again in 2020 as a comment in his track a12. ab3 .215061.:

@c_r_y_s_t:pretty sure it was Dr T's Tigercub on the Atari ST...software you hardly ever hear about.