C4d is far from dead imo. But, he's right on some things.
Since r20 the progress is next to 0. Updates are all over the place and are not targeting professionals anymore. The pricing model is too much, no indie (no reason not to have indie in our times).
C4d is a great piece of software with the best UX and with tons of possibilities, but limited scalability. That applies to people that can really push c4d to it's limits though and not everyone. For the majority there is 0 need in looking into other software.
In order to do amazing things with blender (and any software) u need to be an amazing artist, softwares don't do things on their own, they just give u a head start. Preaching about Blender, but showing next to nothing for it (typical pattern I see online), is common nowadays. I am also curious what is soo much better than c4d honestly, cause with capsules, c4d imitates Houdini's sop tools and there ain't a better way to work procedurally. I really think people go to Blender cause its free. So c4d has to adapt its pricing to fight that.
Lastly, please.. there is no other engine atm in industry but Redshift, Octane and Arnold. Cycles or Eevee are not even competitors. Eevee is not a renderer, its a zpass with diffuse textures. Try to get a job in any proper vfx/design studio by showing in a cv with Cycles/Blender and let me know if u ever hear back 🙂
I think listening to people raging in forums is also helpful though, cause besides random arguments they have some truths in there as well. C4d is not spotless, but its still kicking ass + has a huge community and tons of tutorials around.
But it needs proper updates in terms of performance, needs to stop adding features like Looks in the viewport or GoZ or autoextruded AI files and get serious with a roadmap that address professionals. And ofc more flexible pricing. I work both in c4d and Houdini now, cause of these reasons. And I'd definitely leave c4d for H if it wasn't so damn difficult software.