Apart from rent and salaries, customer chat is our single biggest expense (at very low volume usage, it not being our core business at all). Chatwoot is making it very awkward for the industry and I am glad they do.
I have done IT for small businesses. Every small shop I worked for had to use many different and incompatible assortment of software tools to set up the IT for the business: Windows system for a proprietary billing software, OpenBSD system for routing, proprietary intercom tech. I envied my friends who worked for proper software companies. They could build everything for Linux, dockerize everything and done! Is there…
When i used to have my IT side hustle company, whenever i supported software for small businesses, i often found that nuding them to web equivalent software made things alot easier. For example, some users get comfy with software faster when its within context of a web browser...Of course, this is different for every user/org and with different software, it depends. But it lessens your support away from conventuional desktop supporot. However, if the web softeware is managed hosted then its much easier, but if you have to manage the hosting, then you would need web management sort of skills. for me that was my forte, so it was easy for me.
As to your wish to find a linux distro for business tech, there are platforms like Odoo (see wikipedia: https://en.wikipedia.org/wiki/Odoo)...but they're not lightweight, and back to my earlier point, you'd have to build up your skills administrering web apps, server, etc. I'm sure there are plenty of other options beyond Odoo. Try a couple of searches against odoo; the old google hack of "odoo vs..."
Good luck!
EDIT: Sorry, i meant to direct my comments aboive to @importgravity :-)