Apart from finding suggestions that a bath tub might last 10 to 15 years, I'm struggling to find out any information on the strength of acrylic bathroom furniture over the passage of time.
In this case a wash basin has cracked from a falling soap bar; this was a 3" round 'football' soap bar! The landlord is claiming that the rental deposit should be withheld partly on this basis.
I would suggest that the bathroom suite is original to the house built in the 1980's.
Most plastics of this nature loose their resilience and elasticity, but wondering if anyone can point me to more scientific details.