Support experience

Hi all,

Looking to find what everyone experience with support it with Network vendors, My company is currently a Cisco only shop I've inherited (2960s access, 4910 core, Asa's, merakis)

With a move impending to a new office and colo we have opportunity to replace -some- items (not all...thanks covid) this summer.

Vendors Include cisco, Aruba, extreme, Mellanox, juniper

We have quotations from vendors regarding core switching (32x100GbE ports core) to start, wifi and firewalls to follow but I'm curious how others experience with the following companies are, from customer support, implementation, intercompatabily day to day running, gotchas etc

My experience is limited Cisco only from here, but I'm curious if anything is better.. especially for an almost solo infrastructure admin

We ran off our old core for since 2011 so the speeds are to future proof growth of our growing media company (200 employees, ~3 petabytes of data)

Access switches will be staying our 2960s this year, with hopes of swapping next year to the same switch family

(thanks to covid it not being the entire) Specif