A GOOD current probe is one of the most useful probes for any time domain instrument. It might be of low apparent value to you now due to a lack of understanding of how to use and what to use it for. In time, that may change dramatically and that current problem will be a measurement saver.
FYI, the normal test set up is two voltage probes, one voltage differential probe and one current probe.
Good probes are the most valuable accessory to a time domain instrument. Depending on measurement needs adding a DSO could be of lesser value than believed. Low quality, high distortion, poor durability probes are the source of immense measurement grief.
There is a steep learning curve with a analog scope such as a 475. Operating it is just one challenge, the far greater challenge is learning how to interpret, deeply understanding the display wave form. This is no different than learning a foreign language. It requires much study, effort, concentration, making errors and more. Extremely intimidating for anyone at the start. What the modern DSO does offer is similar to automated language translation where the time domain display is automatically interpreted for you into a very familiar language that is easy to understand and it is also stored in memory for easy recall. Information can be lost or altered during the translation with the deeper meaning dropped and disregarded post translation.
This could be why there is regret in purchasing the Tek 475 vs any modern DSO.
Bernice