Customers are much better informed now, and the hype of Juniper (products) is a thing of the past. Juniper does not have a default way in, to any account, including service providers.
Arista is the new black. Even (communications) service providers are enamoured by Arista.
No one cares about Juniper, Cisco, HP, Huawei, Nokia etc. etc. and over priced, outdated portfolios.
Once the ownership of Aruba changes hands, Arista will be a much stronger candidate in enterprise networking. Arista has enough features to solve a majority of the growth needs of SPs, and they are focused on getting entrenched in communications SPs, just as they have done with Cloud SPs.
This is why there will be more layoffs at Juniper, Cisco and many other places. Juniper and Cisco have been beat. That’s the bottom line.
Perfectly put by @QFVrYjh-7ziw.