Some of the Wikipedia comments are driven by the use of DRAM-based and Flash based SSDs in datacenters - not laptops.
# Capacity – currently far lower than that of conventional hard drives (SSD capacity is predicted to increase rapidly, with experimental drives of up to 1 TB in tests.)
Well - you know the capacity - 64GB and 128GB - either it is enough or it is not.
# Higher vulnerability to certain types of effects, including abrupt power loss (especially DRAM based SSDs), magnetic fields and electric/static charges, in comparison to normal HDDs (which store the data inside a Faraday cage).[dubious – discuss]
1) this is quite dubious. Both magnetic hard drives and flash based hard drives can lose data in a power loss. I'm not aware of any substantial difference. Of course, in a Thinkpad, you have battery back up for AC power loss.
2) most of these issues are unique to DRAM - not Flash.
# Limited write cycles – flash-memory cells will often wear out after 10,000-100,000 write cycles, while high endurance cells may have an endurance of 1–5 million write cycles (many log files, file allocation tables, and other commonly used parts of the file system exceed this over the lifetime of a computer. Special file systems or firmware designs can mitigate this problem by spreading writes over the entire device (so-called wear levelling), rather than rewriting files in place. Today's drives can last up to 20 years with average usage.[dubious – discuss] An example for the lifetime of SSD is explained in detail in this wiki.[dubious – discuss] SSDs based on DRAM, however, do not suffer from this problem.
All laptop flash drives have substantial wear leveling - but this is a risk, especially if you get a malicious or broken program that keeps writing to the drive. SSD endurance is less than magnetic disk - but it is not yet very clear if this is a real-world problem.
# Slower write speeds – as erase blocks on flash-based SSDs generally are quite large, they are far slower than conventional disks for random writes and therefore vulnerable to write fragmentation, and in some cases for sequential writes. SSDs based on DRAM do not suffer from this problem.
Again - this is primarily a database issue. For the way most people use laptops - reading and writing files in large chunks - this is not an issue. Large hard drives use large sectors as well.
# Lower storage density – hard disks can store more data per unit volume than DRAM or flash SSDs, except for very low capacity/small devices.
Perhaps this is hypothetically true - but practically the SSD one would use in a Thinkpad is smaller and lighter than the hard disk one would use in a Thinkpad.
# Higher power consumption at idle or under low workloads laptop battery runtimes decrease when using an SSD over a 7200 RPM 2.5" laptop hard drive, flash drives also take more power per gigabyte.
This has been observed. 2.5" hard drive power management is very mature. I think that the power management on some SSDs is simply poorly implemented and will get better over time. It is a minor effect.
Hard drive power is not very highly correlated with storage capacity.
* RAM based SSD require more power than hard disks, both operating and when turned off.
Not important to a Thinkpad.