Can the thruster be upgraded?

Could you elaborate on the potential for upgrading the thruster? Are there specific upgrades that are feasible or recommended? Are there any limitations or constraints that might hinder an upgrade process? Additionally, what would be the potential benefits or drawbacks of upgrading the thruster, and what factors should be considered before making such a decision? It would be helpful to understand the full scope of what's involved in an upgrade, including any costs, timelines, and potential risks.