Not that I'm behind splitting up companies. Everything that turns into a monopoly should be nationalized instead.
Even Dropbox - one of only two YC backed companies to go public - isn’t profitable and has said repeatedly they have no idea when they will be profitable. I don’t know anything about PagerDuty.
And what happens as soon as the other party wants to implement policy you don't like?
I don't think it even needs to be a monopoly there are services that makes no sense to have companies competing to provide them.
Most utilities fall under this
Don't get me started on water in the UK.
It's private and you get no choice of supplier, how this is not a national scandal i don't know. At least with Gas/Electricity/Broadband (Excluding virgin from this) at least there is competition if delivered through the same means.
More controversially, post/parcel delivery could likely benefit from being a single company IF run properly, big if, I know.
Seeing that all of the problems with the US postal service are caused by government interference, that isn't exactly a ringing endorsement.
The postal service wanted to cut delivery days to save money - but Congress wouldn't let it. Congress also forced the USPS to fund retirement pensions in excess of any private or government organization.