Tool recommendation for cutting curve in tiles
I believe they are basically saying "They don't make them like they used to". Which is always true. Some things get better, some get cheaper. Many companies make pencil grinders and you don't have to buy a Dremel. Look for something of a quality level and price that matches your purpose and budget.

If you only have a few small cuts to make you might consider a coping saw with an abrasive tile blade. You can also use a set of tile nippers to carefully remove small chunks of tile from a corner or edge.

If you have holes to make for pipes, they sell abrasive hole saws made for tile.

Good luck!