These benefits have boosted ASP usage, all the researchers have found. But usage is not ready to skyrocket, most experts say. Even the early adopters acknowledge some concerns. Top among them are skepticism about performance and caution regarding security. Also, it simply takes awhile to become accustomed to Web-based applications.
Performance is an obvious concern for many users.
You may not be able to access your applications when you need them. Ditto for when your own Internet connection is down. Our research found that users are willing to accept more downtime than I would have expected, a number of days per year. Security is also a primary concern. Since an ASP hosts the application, it also hosts much of your data.