I doubt many VCs would see swapping out a founder as improving the outlook of the company, particularly when the issue is the general macroeconomic situation rather than an issue with the founder. Founders are a huge part of the valuation of a company - they've spent years learning their market and how to build/run their company. Once a company hits a certain size, you'll see professional CEOs brought on sometimes, but I would think Triplebyte is too small for that. At ~30 people would the company even survive founders being replaced by VCs?

VCs also like to be able to attract the best founders by being 'founder-friendly' and replacing a founder hurts that image. Starting a company is hard enough - you don't really want investors who add to the pressure.

From what I've heard, COVID seems to have stopped new investments (outside of companies that have gotten a boost from COVID) so that VCs can focus on their existing portfolios.