I'm not sure why so many get caught up in this conundrum about topping or not topping. Detailing is one great big experimentation and finding what works for you and what you like. If every detailer went strictly by manufacturers recommendations we would have missed out on so many methods and combinations over the years. People branching out and trying things is what makes this hobby/business so great. Look right in this thread and you see where a quality detailer, pdqgp, has come up with his own concoction that has proven great results for him and I'll probably be trying out soon myself to see if I like it.
When I got into this a decade ago I constantly changed LSPs and loved doing it, however as life, my career, kids, them playing sports, coaching, etc started to take over a tremendous amount of my free time I began to look for longevity in my LSP. I used Opticoat back in 2010 for the first time on my vehicles and every car I've had since I've put a coating on as soon as I got it home. I have Cquartz topped with EXO on my Camaro and my wife's Yukon, and have CSL topped with EXO on my daughter's Hyundai Veloster. I will do a topper of DG Aquawax on the Camaro and Veloster, and Reload on the Yukon after every wash (that takes absolutely no time now). Heck I've even started doing a monthly regimen of McKee's Hydro Blue on each car after a wash just to try and increase the longevity of the coatings. If doing a 10 minute topper after each wash provides me with 25 months of longevity vs 24 months without it, then I consider that extra month of time gained with my family and life a win. I've been at this a while and I'm of the firm belief that the toppers increase the longevity of the LSP, regardless of traditional or coating, and in this point in my life that's what I'm after.
So if you want to do it, then by all means do it. If you don't think it adds any value then by all means don't do it, but the experimentation, trial and error is what has transformed this hobby/business for the better. Some of the tricks and combinations we use today were discovered and luckily made public on great detailing forums like this one.
Experimentation great but si02/ceramic coatings are not compatible with wax. That's just the way it is. You can experiment all you want but it's not going to make it look better that's just a fact. At least from my understanding on the topic