For all my negativity and rants towards companies de-registering from the SEC, sometimes it does help operations. It definitely saves them money and enables them to spend more time on the business.
The real risk is communication. If they cut the world off the stock can drop to nothing but as long as they keep talking good things can happen.
Dynasil (DYSL) de-registered from the SEC in the fall of 2019 with the hope of saving $900k per year. They filed their last 10k in Dec 2019 and told shareholders to only expect an annual report moving forward. A week ago they put out the report and the numbers back up their motivation for de-registering.