For the collectors out there, DVD sets do exist. While they can be rare and sometimes pricey on the secondhand market (like eBay), they are the only way to ensure you have the show forever, regardless of streaming rights. Conclusion
The most reliable way to own the series in high definition is through digital storefronts. You can often find the complete series on: Amazon Prime Video Google Play Store Vudu symbionic titan torrent link
By supporting the show through official channels, you're also sending a signal to studios that there is still a massive audience for Genndy Tartakovsky’s work—which is the best way to hope for a revival or a spiritual successor in the future. For the collectors out there, DVD sets do exist