There isn't a one stratefy to rule them all. If you want to be profitable you always have to adapt according to the market conditions!
but there are also times when old strategies work again, although at some point you'll have to revise your strategy again while adding the newer ones. as you've have said that it depends on the market conditions, and i still believe that some old patterns are still useful in todays trading style. still for one to become a seasoned trader, you still need to experience more trading patterns or should i say it is the culmination of your accumulated experience in trading.
Old strategies added by recent strategy will work better especially if we know how to deal with the market. There's no specific strategy that will work all the time but things will depend on how we apply them effectively. Old strategies aren't actually old, they were just innovated and improved to work better in the current market situation that we have. Applying and trying out new techniques is also part of a trader's learning and growth.
Agree since as long as you know how the market moves, you can use different strategies regardless of whether it is an old or new ones. The overall market position would determine what suits to be the best strategy to be employed. No single strategy works all the time so we should be flexible enough to adapt on the changes on the market so we can make our trading be aligned more to success. Explore more techniques to see what works well in different market situation since at the end your experience in these would be a great help to be successful.