There isn't really a great alternative without vendor lock-in. If you go all-in on AWS Cloudwatch/X-Ray, it's a really easy setup with low effort. If you go all-in on Datadog, it's pretty easy. But if you want to mix Sentry, Langfuse, Datadog, etc, OTel is still probably the best option. It's just a letdown that this is the best there is.

I don't mean to disparage anyone working on OTel. I can appreciate that it has ambitious goals and it's not an easy problem to get alignment and interop here. Especially with all the stakeholders involved. But as a user, it feels simultaeneously over-engineered and under-engineered.