I kinda feel at this stage we should go back to air gapped intranets and working from the office again. SAAS just isn't worth it, and the other things like stack overflow you can do from your phone.
SaaS offerings that are in a browser tend to be pretty safe. I'd be more concerned with data theft than my network being compromised.
SaaS is so totally worth it and is hardly the problem in this case. Though the Internet connectivity and auto-updating is getting notably untrustworthy.