It's not so bad, most companies are not 'high flying' but if they have 'startup culture' ... maybe not such a great thing.
Also - family companies can be odd. It very much depends on the situation.
An 18 year old company should simply not be referring to itself as a 'startup' and they should have at very least be settling into some kind of routine. It's fine if there isn't hypergalactic growth - but something fundamental should be there.
(I work for 15+ year company that like to view itself as a startup - but the partying is definitely optional)
Or they didn't have a need to. Why depend on other peoples money if you're fine without?
More money is a powerful sign of momentum, and it generally increases valuation.
So sure, maybe $50M is enough and 'more' just comes on worse terms ... but a small company avoiding going past Round A ... it's far more likely they just couldn't raise.