I have no idea what tidyquant is but it seems to be actively maintained (last commit 3 days ago) and highly liked (260 stars). When I find a tool that is useful to me and that seems to be maintained, I don't hesitate to use it.
Maybe you shouldn't worry about what will happen to tools in the future as this is impossible to predict, not only because they may stop being maintained, but also because different and more efficient tools with a similar goal might take over, plus so many other parameters... So if it is good for you today, I'd go for it.