I know that the penalized Regression is robust to collinearity. I also found a page at scikit-learn : Plot Ridge coefficients as a function of the regularization says it "shows the effect of collinearity in the coefficients of an estimator."
Here is what beats me. There are pattern in heavy wave, or in mild slope; some variables are in same trend, others not.
How do I observe the effect of collinearity from the regularization path plot?
Also does L1 and L2 regularizer has different pattern for collinear variables?
Or detect collinearity using path plot is bad idea?