FYI Aside from the first link all those threads are from 2015 or even earlier. I mentioned I wanted current info. Science always coming out with new **** to put in our bodies.
You realize most of the pre's today still use the stuff from the past. Another reason why some companies and products have been on the market for years and are still massive sellers. The same pump ingredients (Citrulline, Hydromax, Glycerol, Nitrates) are still used time over time again with a minor twist of 1-2 ingredients.
Same things used for performance (LCLT, Beta-Alanine) and endurnace are still huge hits, the only real addition is Peak02 (which you can buy bulk)
Creatine has been a staple for what a decade now? That has not changed.
Still you have avoided the question asked... what are you really looking for in a pre? A 2 year difference in science is not going to make a major difference in the pre you select.
Plus if some random person on an online forum says "oh i love this pre-workout" chances are you won't buy it. Not everyone works that way, if we did we would all take the same product, doses, and we would all reap the same benefits.