Are Tanks Obsolete Weapons?

[Whack-a-Mole]

A recent thread on this:

Are tanks of any use anymore on the modern battlefield?

I have seen it said that the reason one military needs tanks is to defeat the tanks the other side has. In Ukraine we are seeing Russian armor not doing well. Of what use is a tank if it can be taken out by a much cheaper system? Javelin antitank missiles cost around $200,000. Replacement missiles cost about $78,000. A TOW missile costs even less. An Abrams tanks costs around $9 million. So, why go tank-vs-tank? Why not make a jillion man portable anti-tank missiles and be done with enem…