4
The controversy was not so much about the tension between vis viva and mechanics, as about what is the "true" quantity of motion, vis viva or momentum, and what is the "metaphysical" basis upon which mechanics is to be built, vis viva or Newton's force (aside from multiple other side issues that got entangled with it, see What was the vis ...
2
In the paper Einstein's controversy with Drude and the origin of statistical mechanics: A new glimpse from the "Love Letter" by J. Renn, (1997), we read:
The nature of Einstein's objections to Drude's theory [...] has remained just as unknown to us as the character of Drude's response to a letter we know Einstein had written to him around early ...
Only top voted, non community-wiki answers of a minimum length are eligible