Bun support in Workers

Is it possible to use Bun as a runtime in CloudFlare worker? As I understand by now, no, it isn't: there is this discussion. But also there is this PR https://github.com/cloudflare/workers-sdk/pull/4065, which fixes this issue https://github.com/cloudflare/workers-sdk/issues/3941 and added "bun support" to wrangler, I suppose. So which is true? In what form Bun is supported now in Workers?
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