I often wonder if there really was a dot com bubble. Some companies failed, but shouldn't we look at the software market as a whole?
Look at the performance of th qqq certificate, which invests in the largest 100 non-tech companies in the Nasdaq:
https://www.google.com/search?q=qqq
And click on "max". It goes from $52.97 in May 1999 to $485.51 today.
That is an annualized ROI of 9.21%. A better performance than many other market indices had over the same time.