Sure but definitely not because of an old router, right?
I don't pick sides. I really like to stay neutral as much as possible.
In SA we have a very interesting and actually great system. We have Cable Providers and then ISPs. Other countries don't they usually have an all in one solution.
This is nice because you can shop around use different service providers that moght offer better support or routes but one thing usually stays the same the cable provider just like adsl you can always change ISPs but Telkom will always be the your cable provider.
We all hated Telkom for those slow unreliable lines and expect fibre to be the solution. It is but they also like money so packet loss is a REAL issue.
You notice it more now on fast fibre lines than before on adsl.
One thing that you csn pick up from all the fibre threads here on mybb that in most cases there is packet loss on the end users line which causes havoc. Switching ISPs won't help just like switching ISPs won't help on a faulty adsl line.
Most networks that I managed to test on my line has been pretty good. People on other cable providers like Frogfoot and SADV complained here about poor performance when my side on Openserve is snappy and fast full line speed international.
If there is a general ISP network issue you will start seeing WAAAY more complaints rolling in.
Long reply