If you perceive your work to be artisanship (and a lot of people in the automotive and custom bicycle business do, along with people in the high end furniture business, for example), and you have enough customers who agree, and enough work to keep yourself and your employees busy and your families all fed, then a messaging system that speeds up productivity really is
a lot of bollocks, basically (particularly for a company which is, in my experience of these amazing people, still disproportionately likely to hire people with dyslexia or reading difficulties). Because you cannot do more work of the same quality faster.
One thing tech people misunderstand is that these "artisanship" oriented companies can scale at least into the dozens of employees, almost all of whom want to do methodical uninterrupted skilled work or quiet, consistent labour, and who would rather hire four or five very understanding, very capable tech people to handle all that stuff for them. This is not a failing, it's a culture. Some great businesses in the UK run on the "don't add unnecessary tech bollocks" model, and IMO they should be encouraged to continue if they can, because that, it seems to me, is one route to surviving in an AI-bullshit-led industry.
The fact that the tech industry seems to thrill at systemically fucking this up and selling systems users do not need based on marketing fear that they are falling behind is quite depressing to me, not to mention a failure of systems analysis. Just because you are a tech person it doesn't mean you should be selling a messaging system to people who actually could just get the benefit from one more person to handle co-ordinating with the front office.
Tech people are, IMO, quite irresponsible in this way. We have all been trained to answer "we have a problem with X" questions with "we can build you a Y for that", when responsible consultancy would first rule out non-technical process flow improvements.
This is not Luddism. It is obvious that in skilled-work industries you should get things like "office-wide-instant-messengers" out of the way of people doing the skilled work so they can do it uninterrupted at an appropriate pace. There is no non-desk-bound job that is meaningfully improved by notifications buzzing.