TeamViewer is useful because remote support is rarely convenient when it arrives. Someone needs help on another machine, access is needed across distance, or a work device must be reached from elsewhere, and the fastest workable solution matters more than building a custom remote environment from zero. That is the space TeamViewer has long occupied.
It is especially suitable for support-minded users, small teams, family tech help, and practical remote access scenarios where quick setup and broad compatibility matter. If the goal is to connect to another machine and solve a real problem rather than administer a full internal remote desktop infrastructure, TeamViewer can be an efficient path.
What makes it worth keeping is accessibility. The barrier to getting a remote session running is lower than with many custom setups, which is exactly why people keep returning to it for support moments and occasional access needs.
The tradeoff is that convenience increases the importance of security discipline. Remote access tools should never be treated casually. Accounts, device trust, session permissions, and unattended access settings all deserve attention, especially on machines that contain meaningful data.
My recommendation is to use TeamViewer when you genuinely need remote support or access on Windows and want a well-known tool for that layer of work. Set it up deliberately, protect the account and access path, and use it with the mindset that convenience must be matched by caution.