As a home inspector I would advise getting a video inspection performed to validate noting has collapsed in the line slowing flow.I would check that it's not a "eco" or "low flow"  water conserving toilet as they only exacerbate the issuelastly.

I assume that if this line is not replaced prior to construction the construction will almost surely collapse or damage it and I do not think I am being alarmist or paranoid. 

Engineering /Inspection requirements and repairs are likely going to be super expensive moving forward after the collapse of Champlain Towers South in Surfside.   

With all the volatility this year, it is easy to forget we're less than one year removed from the collapse of SVB and Credit Suisse, when the banking system was perceived as considerably more fragile.

The orangeburg is collapsed and it's only a matter of time before it's completely plugged

One day a balcony collapses and a tenant is on it at the time. 

With this way of doing business we might have avoided the collapse of 2008 all together.I do retract my previous statement saying it was “100% waste of my time”.

Replacing a collapsed sewer line is invasive and expensive, so you want to know the condition before you buy.

They collapsed in 2003 or so leaving many note sellers with no recourse to collect promised future payments.

The neighbor doesn't seem to care if his home is at risk of collapsing or my house will be collapsing soon.