Synthetic DNA for data storage seems much higher to degradation (ie, heat, light, or other sources of radiation). Not sure if I would use syn DNA to for anything long term.
The oldest sequenced DNA is 1.6 million years old. In the right conditions, it lasts far longer than pretty much any storage method right now. Plus I also sometimes store things in Bacillus subtilis, which is very hardy https://keonigandall.com/posts/sporenet.html