A good logic/protocol analyzer and a scope have quite different use cases and depending on what you want to do with it, one is much more helpful than the other.
If you're doing mostly digital stuff and want to investigate why a certain protocol is not working, a logic analyzer is so much more helpful than a scope - even if the scope has a protocol decode option.
Then again, if you want to investigate the real physical signal regarding noise, slow edges and every other analog attribute, a scope is your only option.
Besides a scope gives faster updates and is your number one choice to quickly check signals or measure a simple PWM even though this would be possible with a logic analyzer.
In the end you need both.
BTW: as usual, I vote for the Ikalogic ScanaPlus as Logic Analyzer. Just again, it was incredibly helpful to debug issues with a 10MHz SPI controlled display.