What are the limitations of single-nucleotide polymorphism (SNP) technique?

Limitations of Single Nucleotide Polymorphism (SNP) Technique:

• The biallelic nature of SNPs reduces their informativity per locus compared to STRs
• Array platforms that run multiple SNPs simultaneously typically demand larger amounts of DNA than is possible to obtain from a small or degraded sample
• Currently limited data on X-chromosome SNP usage in forensic analysis (despite studies suggesting potential applicability in population characterization and relationship testing)