The world Covid situation is the real dark horse. Any place is vulnerable to explode again, and that includes Italy. Let's hope not.
Chailly did do a terrific "DLvdE" with Jard van Ness. It didn't get recorded, but I think you can get a 'pirate' of it from House of Opera, or elsewhere. I don't remember who the tenor was. I saw them do it in S.F. in, I believe, 1990. The tam-tam was fully audible throughout. They used a Wuhan and played it with the flange perpendicular to the audience (not parallel). While that's visually less pleasing, you actually get better results playing the tam-tam in that manner. I proved that point to myself back in my hack, amateur 'percussionist' days. The Vienna Phil. does that quite often.