My concern is not the theft or privacy issues. You always can encrypt, take of hdd/ssd, create an image and wipe laptop. Theft is also preventable, I always use TSA lock on my bag.

But it will be ruined in the luggage. People who load/unload the luggage are so sloppy, they don't give a damn about fragile items.

Once I was transporting a bottle of an expensive alcohol. I wrapped it in plastic bag and put in the middle of my bag, surrounded by lots of clothes. On arrival I got only lots of pieces of that glass mixed with alcohol. The bottle was extra thick, they managed to destroy it.

I need my laptop all the time. Well, not in the cabin, but on every travel. I rarely carry something big, so I travel with carry-on bags mostly. So my position on that: screw them, if it will go global, will have to think twice to take the flight, instead of night train, for example. So far I'm glad I'm not living in US =)

Don't put all eggs in one basket ;) Use something else for calendar/email/cloud. I'd even suggest self-hosted solution, like Nextcloud.
It won't solve the email problem, but it's easy to install calendar/contacts/cloud storage on your own server

Sad, but true. Google search is #1, but there are wrappers, like startpage.com.
Can't agree about the maps. Google Maps is getting worse and worse. I use it only when I can't find some organization in OSM. Apart from that, OpenStreetMaps are wonderful and a good replacement for Google's product

I use Apple's iCloud mail, because it's fast on MacBook, but my main mail is in Protonmail
Google's Music, because I can't keep all songs on my laptop, but it's good to have your own collection uploaded somewhere...and for free.
Amazon's Kindle, but only e-reader itself, so there are alternatives.
Microsoft's Skype... sadly Skype was bought not by Google, I wish it dead =)

But if some of these companies will disappear, I will be only happy. Maybe only not Amazon, I like their Kindle e-readers :D