Every job I’ve ever had has used ADP for payroll.

The radical left are everywhere!

ADP is essentially the only reliable payroll processor I've ever used (and we've tried a half-dozen now).

Every. single. "startup" we tried screwed up at least one payroll. Gusto ruined three.

ADP don't miss.

Also have one of the worst business websites I've ever been forced to use.

They have the lowest growth of their industry (granted, they're ~25% of the market) and every company I've been involved with for the last 20 years either uses a competitor or used to be an ADP customer. ADP is terrible.

Paychex, Workday, etc have been eating at their lunch for years and years now. My perception of companies using ADP is either that they're slow behemoths or they still have some niche issue that's keeping them from switching.

ADP is also incredibly cavalier with your personal data. As a potential employee I would see its use as a strong minus.

As someone who has used ADP for the better part of 15 years, off-and-on obviously,"ADP is terrible" has not been my experience.

My experience has been that they're 25% of the market for a reason.

They work.

1 in every 5 employees works at such a company.

And?

It's a statistically significant sample size. If you think 20% of employers are doomed let's see your puts.

I'm invested significantly in a competitor payroll company carving out an underserved niche market. It is well loved by its customers and rapidly becoming that industry's default choice.

That's not the same thing at all. You said any company using ADP was doomed. Ergo you should be betting against all these companies.

If anything your investment in an ADP competitor significantly undermines your credibility.

I didn't say doomed. I said I would have a grim picture of the future.

That is not the same thing. You may interpret it that way, but that's you. I think companies using ADP correlates highly with companies treating their employees like shit. I also think companies using ADP correlates with underperformance in current market conditions.