I'll admit I'm somewhat biased against Bun, but I'm honestly interested in knowing why people prefer Bun over Deno.
The tools that the language offers to handle use after free is hardly any different from using Purify, Insure++ back in 2000.
Who knows?
Besides, how are they going to get back the money spent on the acquisition?
Many times the answer to acquisitions has nothing to do with technology.
Anthropic chose to use Bun to build their tooling.
Profit in those products has to justify having now their own compiler team for a JavaScript runtime.