Knowing the TB written from CrystalDiskInfo will give you an idea of "lifespan" -- But most SSDs will outlast the PC they are connected to.
Any disk can fail at any time. Independent of the amount of data written. If you have important data, then you need a comprehensive backup implementation.
CrystalDiskMark is a widely used tool for at least verifying the SSDs in question get roughly the read/write speeds they are supposed to, about 500-550 MB/sec for SATA (sequential reads/writes) and 2500-3400 MB/sec for NVME drives)