You should be fine. It is about temperature and time. Don't keep the nozzle heated up when it isn't used. Don't dry it frequently (keep it in a dry environment) and use low temperatures.
190° is the low end of printing temperatures. SainSmart should probably be okay when printed below 210°C
With "special" PVA like FormFutura Helios you go up to 250°C: https://formfutura.com/product/helios-support/
Regardless BVOH should be the better choice at higher cost.
I hope that one day the constant bullying of Stratasys backfires.
Overall the patent system is in dire need of improvement:
Right now we are at a point where the trivial patents are so dominant that I believe the patent system does more harm than good. Stopping progress/innovation instead of encouraging it.
Stratasys: probably doesn't feel BambuLab at all at the moment
Ultimaker: there is some pressure. Dozens of companies are using BambuLab but they still have a customer group that isn't yet addressed by BambuLab
MakerBot: Hell yes. Why would anybody buy a MakerBot right now? Their entry-level printer is at the same price point as a BambuLab X1C and gets obliterated by BambuLab's performance. I also see how education facilities (schools, universities) are choosing BambuLab offerings.