We have two servers running Debian stable. One installed dolibarr on x86 for ERP/CRM. Another installed on ARM64 for employee punch clock. We use Debian because it is secure, stable, and due to easy portability for different arches.
We also have many instances of Debian testing installed on desktop and laptop computers. We use KDE as our main desktop environment across the company. Employees are using LibreOffice to write documents, chromium browser for G-Suite and our dolibarr ERP/CRM. Also we use Debian to control our 3D printers through our own program and octoprint.