When AC first offered SaaS I remember its cost being an additional $39/user/month. This would have cost significantly more because of the annual cost of paying for each user (6 in our case) versus the 2 one-time physician license fees paid when we started AC. Support and Maintenance was a mandatory purchase, which we have anyways for e-prescribing.
Aside from costs, and correct me if I am wrong, SaaS requires a small installation on a Windows OS machine. It doesn't work on Macs. Moreover, and this obviously wouldn't be an everyday occurrence, but if we needed to upgrade computers at home or the office the initial setup would be required again before accessing AC.
If it were a web-based version you could access AC from any device with a web-browser. Well maybe not smartphones and tablets, but a mobile app is the last thing on my wish list.
