Computing power can be increased by scaling vertically or horizontally. Vertical scaling has an upper limit, and when one reaches it, in certain contexts, end of the happiness :-)
Case in point: GitLab; they have Go microservices. GitHub was also hiring Go developers, so very likely they've done the same.
Of course, few companies are GitLab/GitHub, but the point is that it's not possible to make absolute statements about power being cheap.
By being able to run your service on a single server instead of ten allows your team to focus on features instead of scaling your application using background concurrency, caching, or “micro-services”.
Imagine what you could do when you don’t need to manage a fleet of web-servers.
Conceptual compression means that you can unpack those ideas and work with them when you need them, or pack them back up and don't pay attention to them when you don't need them.
The biggest example that I can think of is ActiveRecord. I can't tell you the number of times I've seen presentations by programmers who work with other frameworks like .NET, who have embedded large, complex SQL queries into their code. They don't think twice about it, don't even flinch, parsing SQL is part of the cost of doing business in this language.
Having said that, it makes me a bit sad that there are quite a few developers who actively avoid SQL. Granted the syntax is absolutely awful, but it is a very useful and powerful language. The concepts behind relational databases are embraced by SQL in ways that I can't imagine in any other language (I'm sure there must be other good relational query languages somewhere, but I've never been exposed to them). Honestly, if I have developers working with a relational DB doing anything even a little bit complex I want them to not not think twice or even flinch to use or read it (and I say that not really being all that accomplished with the language myself).
Rails has some good niches where it is very well suited. ActiveRecord is OK if you have a very particular data model. However, as they say, if a hammer is your only tool, every problem starts to look like a nail. You may find that if you approach the problem differently, you will find reasons why people choose not to use very simplified ORMs.
What ActiveRecord isn't is discoverable. Which is to an extent understandable. Its domain is literally anything you could express in SQL. But you really can do anything you want with it, you just have to find the right abstraction. A tool I use a lot is to .to_sql which will show you the compiled SQL fragment in a debugging session. You can compose with bare SQL fragments and ActiveRecord even includes an intermediate library so that you can work at the relational algebra level if you want.
It's not that ActiveRecord forces you to work a certain way. It just doesn't advertise all its features.
Ryan Bigg wrote a great book about breaking away from AR in Rails called Exploding Rails[3]. It's a good read.
[0] http://sequel.jeremyevans.net/
[1] https://github.com/elixir-ecto/ecto
[2] https://rom-rb.org/5.0/learn/introduction/active-record/
Granted [SQL's] syntax is absolutely awful, but
it is a very useful and powerful language. The
concepts behind relational databases are embraced
by SQL in ways that I can't imagine in any other
language (I'm sure there must be other good relational
query languages somewhere, but I've never been exposed
to them)
It's somewhat significant, I think, that when Microsoft came up with LINQ (sort of a language- and backend- agnostic query language) they basically settled on something that looks like SQL but puts the FROM clause first, mainly so the editor can give you typing hints.
I'm not saying LINQ was a rousing success, but that was a pretty major greenfield MS devtools initiative and they have some pretty smart language/compiler people, so it's interesting that they settled on something not too different from good ol' SQL.