yes, it's obsolete, dead, unsupported, …but not buried 👻
You are using nvidia-34xx on F40 and wanna upgrade to F41 or F42 but still disagree nouveau it's the way.
  
You followed RPM Fusion advice.
Then failed to dnf system-upgrade download --releasever=41/2. 😔
  
Tweak your X11 startup to use -ignoreABI.
      
e.g. with lxdm, edit /etc/lxdm/lxdm.conf, go to [server] block, append option to arg= line.
    
Xorg ≥ 1.20.99 conflict line,
      build your F41/42 RPM.