A lot of businesses can get by just fine with making it one person's responsibility to maintain a spreadsheet for this. It can be fragile though as the company grows and/or the number of items increases, and you have to make sure it's all still centralized and teams aren't randomly purchasing licenses or subscriptions without telling anyone, it needs to be properly handed off if the person leaves/dies/takes a vacation, backed up if not using a cloud spreadsheet... I've probably seen at least a dozen startups come and go over the years purporting to solve this kind of problem, other businesses integrate it into an existing Salesforce/other deployment... it seems like a fine choice for an internal tool, so long as the tool is running on infrastructure that is no less stable than a spreadsheet on someone's machine.

In the startup world something like "every emailed spreadsheet is a business" used to be a motivating phrase, it must be more rough out there when LLMs can business-ify so many spreadsheet processes (whether it's necessary for the business yet or not). And of course with this sort of tool in particular, more eyes seeing "we're paying $x/mo for this service?" naturally leads to "can't we just use our $y/mo LLM to make our own version?". Not sure I'd want to be in small-time b2b right now.

Why are you ignoring the fact that grabbing data from heterogeneous sources, combining it and presenting it is generally never a trivial task? This is exactly what LLMs are good for.