Although this has been mentioned by others, I wanted to bring a different perspective to the request. Apologies for doubling up on the ask--

Please allow users to create multiple signature profiles. It is impractical for many businesses and, honestly, the effect is kind of sexist. The impact of the policy likely affects women who use Acrobat DC disproportionately as they are more likely to use separate names in the workplace and their private lives compared to their male counterparts. They are also more likely to serve in roles where they may have to sign on behalf of one or more people in a professional setting compared to men.

Additionally, many people in the same household share a single computer or an account, and these individuals may have to sign the same or different documents.

While the issue of only allowing one signature is merely a hassle, it does cause stress for people, wastes valuable time, and forces workarounds for a task that is supposed to be made easier by your product. Further, there is also no legitimate reason for only allowing one signature when previous product versions allowed it and there are ample ways to accommodate so-called security concerns.