[da_chicken]

I've found that SQL Server's is generally pretty good, with the big pitfall being the system's timeout for the query planner/compiler. Query compilation timeouts can be really frustrating to work on because, often, the query's complexity is a requirement.

The only other problem is the parameter sniffing problem for stored procedures, although OPTIMIZE FOR UNKNOWN or specified values seem to work fairly well in my experience, though obviously not always.

The real failing is that a common solution to a view query hitting the compiler timeout is to replace it with a stored procedure of some kind. However, if you're not careful you'll run into the parameter sniffing problem with stored procedures! So you run into one caveat and your attempted solution runs into the other one.