The founders who went for batteries were all about heavy acceleration at the time, which Hydrogen couldn’t really do.
He took over 5 years in when they already had the Roadster in production and the model S design was largely finalized with the goal of ever cheaper and more mass market cars over time.
The cyber truck’s look and buying solar city were definitely under his leadership, other moves are less clear.
Cybertruck seems to represent him making all the same fundamental mistakes that were present in the original design of the Roadster, by being too expensive to produce. (Compare the price as announced vs. as delivered, and that's not justifiable by inflation).
The reports I've seen say Musk took an active role within the company starting in 2004 (Eberhard was asked to leave in 2007), including overseeing Roadster product design from the beginning (but I've not seen citations for this), and was behind the idea of using the sports car to fund the development of mainstream vehicles.
As I understand it, the first Roadster to be delivered was to Musk and in Feb 2008? So between Eberhard and Musk as CEO.
The best I can do for citations is this, but this is Musk writing on Tesla's blog — I would like to say crucially the date stamp is before Eberhard was pushed out in 2007… but the oldest archive copy is 2010 not 2006 when the blog post claims to have been written, and when the guy himself has a trust deficit I think it's worth being open about this discrepancy: https://web.archive.org/web/20100802142703/http://www.teslam...
He took over 5 years in when they already had the Roadster in production and the model S design was largely finalized with the goal of ever cheaper and more mass market cars over time.
The cyber truck’s look and buying solar city were definitely under his leadership, other moves are less clear.