[jacquesgt]

I used to work in the industrial controls industry. The systems are often designed by application engineers working for the industrial control equipment’s manufacturer or distributor. In the case of distributors, the engineering work is often provided for “free” and paid for with the markup the distributor applies over their cost to purchase the components direct from the manufacturer. Those same application engineers will be involved with helping to make the sale. If a customer asks “can I connect this to the Internet?”, any response other than “of course!” is liable to result in a talking to from the sales manager for that account.

Few of the incentives in that industry lead to good security. More details here: https://news.ycombinator.com/item?id=3260127