Re: keep governments away
The reason big tech have become so dominant is due to our increasing reliance on big data. That is only going to become more prevalent.
Most corporate entities simply cannot afford to rollout the required infrastructure and maintain it, it’s not their core business.
The idea of freeing themselves from big tech via self hosting is unrealistic.
But that's not what they're doing. They're doing things that are extremely realistic. To say "it's impractical to self-host big data" rather misses the point that even for very large businesses, the total requirement to self-host your key productivity/business services runs to - at most - a couple of racks of hardware. Crikey, you can host thousands of mailboxes from a single 1U server. Obviously it would be preferable to have some redundancy and backups(!) - but we're not talking hyperscale compute here. It's actually an underwhelmingly small estate.
Also, On-Prem/Colo-ing your core business functionality doesn't mean you can't selectively use cloud for big data/analytics. But that's a tiny proportion of your workforce.
Email, Filesharing, LDAP/AD - there's simply no need to bundle all that into Google Workspace or M363 except that the right people have been wined and dined.
Schleswig-Holstein migrates 30k state workers off Exchange/Outlook to Open-Xchange/Thunderbird. (The state began rolling out LibreOffice as its standard office software last year)
Austria's Federal Ministry of Economy, Energy and Tourism (BMWET) migrates 1200 users to Nextcloud in 4 months. (Albeit hybrid, with Teams still available for external meetings).
Denmark's Digital Ministry is replacing Microsoft services with LibreOffice and Linux.
France bans Whatsapp for govt workers and mandates self-hosted Tchap service (Matrix).
Bundeswehr moves to a Matrix-based messaging platform
At the end of the day, 1200 staff on 365 Business Standard is £11k/month - and realistically, some portion of them are on Premium, or E3/5, so you're actually looking at ~£25-30k/mo just to Microsoft - nevermind your own helpdesk payroll.
£350k/yr buys you a stack of basic mail and file servers (which will last 3-5 years), with more than enough left over to hire some additional in-house admin staff (because it's not like M363 frees you of the need for in-house helpdesk). And it keeps the lawyers happy since cloud was being deemed incompatible with both GDPR and NIS2. It's not all about money.