I have some replies to what @sujato said here:
We should, as people who care about an ethical life, at least make efforts to seek alternatives. For myself, regarding the Big 5:
I don’t use Facebook, never have
Me neither. 
I don’t use Apple, never have
Me neither.
Over the years I have ordered one or two things from Amazon, but I’ll try to avoid doing that ever again.
I’ll plead guilty to patronizing Amazon more than I should have… this is a bad habit to stop.
I use a few Microsoft-owned products for development: VScode, Github, npm. (Non-programmers probably don’t realize how much of a programmer’s everyday tools have been bought by Microsoft in recent years.)
Since all of those are mostly- (in the case of VScode) , or all-open source friendly, I can’t say I blame you here.
From Google, I still use Gmail,
I don’t have a gmail email address, but sadly I have to have a Google account, which allows Google Play Store use whatsoever, on an Android phone (unfortunately needed for security updates).
Having a gmail address, it turns out, is super pernicious, to anyone and everyone who wants to run their own email server.
I personally run an email server, which controls 2 domains I effectively own. @bhikkhu.ca, and @ebt.support
I can create working email addresses in those domains. Complete with secure IMAP, etc. But when any email from such a totally legitimate domain comes to Gmail, Gmail has a hair-pin-trigger propensity to consider all email from those domains to be spam. Only one gmail user need flag any one message as spam, ever, for Google to conclude that all msgs from that domain, wholesale, must be spam. Even in the middle of a threaded, back and forth conversation, msgs can all of a sudden be classified as spam, and the conversation is derailed
So these custom email domains only have the usefulness of talking to addresses within the same custom domains, or domains like protonmail.com, who have sane spam policies. So this breaks the federated goodness of email.
Google are such excruciating scalliwags of the highest order, for effectively derailing federated email.
I have all the current proper DNS records an email server should have: DKIM, SPF, DMARC, DNSSEC, etc. Doesn’t matter to Google.
Gdrive, Youtube, Android, Maps. I usually use Firefox (Chrome as backup) and DuckDuckGo for search. SC’s front-end uses Google’s open-source “lit” library; however I have to say that the peeps on that particular project are very cool.
Instead of Gdrive, I use Nextcloud, and have done so for years. Works great, as long as you stick to the most common and stable apps within Nextcloud! The file storage feature is super mature.
I must admit that I use Youtube more than I should.
As to Android, I wish there was a decent smartphone OS alternative, but none are really mature enough, IMHO. I tried LineageOS for a while, but got burned badly a couple of times (even after obtaining the most super-compatible hardware I could), then gave up on it.
I would prefer not to use Google Maps, but alas, it does such a great job sometimes.
I do use Firefox and DuckDuckGo as my go-to browser and search engine.
We don’t have to get out completely, even if that’s possible. But the more we seek alternatives, the more we slow down the creep of monopoly and its attendant ills.
Agreed. Every small step we take, away from those evil platforms is a step towards independence and self-sufficiency. Every little click and tap you spend inside those evil platforms is a little vote for the legitimacy, and continued domination of said evil platforms.