[Abby0]

Cisco has poor software quality and control when it comes to IOS (Cisco OS not Apple's iOS) implementation that differs based on the end client or customer using their networking devices. This includes small/medium companies, universities, Large enterprise, Internet service providers, Data center, network storage...etc.

Each of the previously mentioned groups have their own implementation and licenses for specific IOS version running inside the network device (whether a Firewall, Router, Switch, or Switch with routing capabilities...etc). It has been long known that Cisco's poor software is due to the hundreds of modules/features they try to support on these devices (you never know which device will receive updates and for how long).

System administrators/Network Engineers alike always complain about the poor quality of Cisco's Software[1][2]

[1] https://www.reddit.com/r/sysadmin/comments/cpcxjx/has_cisco_...

[2] https://www.reddit.com/r/networking/comments/137csr0/why_the...