This part must be emphasized again, "Shit Mountain" doesn't actually have particularly exceptional defense abilities against Inner Strength.
The efficiency of "Shit Mountain" codes themselves is not that great, and their resistance to pressure is definitely much lower than that of well-written, concise code. When facing DOS and DDOS attacks, the expected lag and overheating will occur.
And, at most, it's just not easy to be infested with Gu (likely due to compatibility issues with many modern Gu), but the vulnerabilities and backdoors that are supposed to exist will still be there.
Even if you do find a backdoor within Shit Mountain, it's powerless to fix it.
After all, it's like a building, where the entire base is made of shit paste; attempting to fix it rashly might just trigger more serious consequences.
Upgrading Shit Mountain is just too difficult.
Overall, Shit Mountain is more of a detriment... no, it is almost "all harm and no benefit".