Interesting thread. In response to some of the posts I'd like to point out that the view does not impact the majority of the end users query's.
During actual usage of the data warehouse, the majority of business questions are answered by a joins on the surrogate key, not the start/end date. So the view is never used.
The start/end date are just 'helpers' to find the appropriate fact record to assign the surrogate key. The view would only be executed 'in batch'to assist with the ETL process, not to answer business questions.
It would be nice to assume that the ETL procedures were ironclad enough to keep these dates in line (as they also have to be ironclad enough not to mess up surrogate keys).