>I've always felt the main reason That most companies use Salesforce Is that most companies use Salesforce.

It's like this for most software, but as a salaryman it's better for you if you use the common software. If you have an interview you can now say "I know how to use the thing that most people use" instead of "Actually we had an inhouse system so if you hire me I need to be onboarded for 3 months".

I got hired to my 2nd job in large part because I knew how to use Broadridge Paladyne (back then it was pretty good if you got over the pretty bad UI/UX, by today's standards it's not great).

I think it‘s kind of a common knowledge now that Salesforce is very expensive, so it is not a go-to choice for most startups/no-CRM-experience people. You are more likely to start with Hubspot today than with anything else, but those low-effort CRMs are also quite easy to migrate from. Google Analytics too, so it’s not exactly a „lock-in“. The lock-in happens when you struggle with your current setup or risks associated with it become unacceptable, but do not have the budget and a competent team or external partner to execute the migration.

„Everyone does that“ is definitely part of decision-making process almost everywhere, but I personally have not seen companies where it’s just a cargo cult rather than a reasonable strategic choice. The obvious benefits are that it’s easier to find implementation partners, the costs are predictable and your users may already know the system, so you won’t have unnecessary friction in your ops.