Gpu algos are also having constant issues with 51 attacks. Asics solves this issue bc nothing competes with asics. Gpu were never intended to be mining cards and if you GPU fanatics love mining so much you should switch over to fpga or asics since they are purposely built for it.
Otherwise it's like saying "hey I love racing and Toyota Corolla is the best car bc it can also do 40 mpg and go a little fast"
with ASICs chances of a Network attack is higher. Only decentralization can help reducing it. What limits someone/somegroup to buy/rent lots of hashrate regardless of it being ASICs or GPU.
Look how zen cash and bitcoin gold got overtaken by a 51 percent attack. It's b/c they were mining on the equihash algo, which currently is being shared with gpu miners and asic miners. Thats a problem b/c Z9 Mini are not available yet to the masses thus the 51 percent attack can easily be performed with an Asic.
Guess why litecoin,Dash, bitcoin, bitcoin cash hasn't had a 51 percent attack. B/c they are all on asics for quite awhile now and future 51 percent attacks will be much harder and expensive to do successfully.
If the coin decides to stick with GPU algo its only a matter of time before another 51 percent attack is performed by a secret asic miner that cracked the asic resistance. Best to get it over with and stay an asic coin for better network security over gpu.
gpu mining is a novelty thought, adapt or die.