I glanced at this with subs but didn't get all of it...
I thought complete meniscectomy was seen as the last resort by everybody since long, and that there's even more reason to keep as much as possible with the advent of stem cell therapy...
Here's a pretty recent study by Cugat, wonder if Fatis meniscus looks like this...
https://pubmed.ncbi.nlm.nih.gov/33134048/
Indeed, it is seen as last resort and in the video Cottet talks about the burden and how often repair or preserving most of meniscus is often overlooked due to degree of complexity
The cited procedure from Cugat is for a technique to repair and preserve the meniscus in cases where repair is not possible due to poor meniscal tissue quality and/or tear pattern - but we were never privy to the exact nature of Ansu's tear. The downsides to this sandwich approach to reshape the meniscus is that it apparently changes the normal shape of the meniscus
& requires a competent joint capsule - there's a nice illustration in the article to show what the suture looks like. Suture may cut off the meniscal tissue ifquality is very poor and/or excessivetension is applied when the knot istied.
Same paper also very clearly states
It is well known that total or even partial meniscectomy results in radiographic evidence of knee osteoarthritis.
Speculative of course in the end since we don't know details but the shift suggests clearly that whatever approach Cugat took (repeatedly) did not succeed. So the tear was probably of a complicated variety (We don't know size/length of tear, anterior/posterior horn, tissue degeneration or degree of vascularization)