Wikipedia's ExoMars explains that the Trace Gas Orbiter or TGO part of the mission was launched in 2016 and the rover was originally scheduled to launch in 2018. This launch was delayed until 2020 and now has been delayed again until 2022.
Question: Do these delays impact the level of support that TGO can provide? Is anything on it getting old or wearing out, or will it still be 100% ready to support the rover once it gets there, for the full potential duration of its missions and any extensions1?
1Deep space missions often have short stated initial mission durations but are actually built to possibly last much longer; the extreme example is Opportunity's 15 years versus its planned 90 days.