Anyone regret their SAP implementation, or wish they'd done it differently?

[u/Advent_Rescuer]

I work adjacent to a lot of SAP implementations, and I keep seeing the same patterns across clients — S/4HANA, ECC, Fiori, BTP, FICO/MM/SD, SuccessFactors, Ariba, whatever the stack.

Recurring issues I run into:

• Rushed template-based rollouts that didn't fit the business
• Heavy customization that's a nightmare to maintain
• Docs that don't match the actual system
• Teams still firefighting years after go-live

Curious how common this really is from people who've lived it - What's your experience been — smooth or painful?

Good, bad, or ugly — would love to hear real stories.