The deeper you go into the Apple ecosystem system, the better their products get.
I can make a solid case for both operating systems, but it really boils down to personal use and priorities.
I don't know if I would agree with that post. To me going deep would require investing a fair amount of money. If you were just starting your journey into the Apple way of doing things you might start with an iPhone or iPad. If your friends and family mostly use iMessage and FaceTime it will be a nice feature. If the people you communicate with use both Android and Apple, then not so much.
From there buying a desktop, you would have to invest at least $1000 for an entry level 21.5 inch iMac all the way up to $5,000 just to get the entry level iMac Pro. At this point I don't count the Mac mini or Mac Pro because it's been YEARS since they updated those products.
From there you would need to spend at least another Grand or more to get a basic laptop. At this point you are getting deeper into the Apple eco system, so you will get to enjoy things like handoff, iMusic, etc. You could add a HomePod or an Apple TV, or an Apple Watch and use your current devices with other Apple products. Now one thing to consider is that every piece of hardware you add there is an alternative. Some are better some are worse. The thing with using Apple branded products is you are limited with what you can do with Apple branded products using other platforms like Android. For example, you cant sync an Apple Watch with Android (As far as I know), and using a Samsung watch with Apple is limited. To use all the features you need an Android phone.
If you buy software on Google it is limited to Android hardware. If you buy Apple it is limited to Apple products. If you buy movies on iTunes you can only play them through iTunes. Nothing else.
Then if you start to add things like routers (Which Apple no longer makes) you will have to look outside the eco system. I find it kind of funny that Apple utilizes Time Machine for backing up your computer, but since they stopped making the Time Capsule, you have to rely on an outside company that makes a product that supports Time Machine to back up your computer. Not sure why they even include the Airport utility anymore in MacOS. Just one example of a lot of loose ends Apple has let linger.
There is a lot more I could point out, but posts like this are usually just glossed over and forgotten. For me in a nutshell getting stuck in the Apple eco system means you have to use Apple products in order to use FaceTime and iMessage. Those are the two biggest limits. You can't use Airplay with anything but Apple products. You can't use Airdrop with anything but Apple products. Those features are just conveniences I use once in a great while.
The biggest advantage of "going deep" for me would be handoff. Nothing more. But again it's a feature I use once in a great while.