פירוש על כתובות 220:15

He says to go up [to the Land of Israel], etc.: It is not practiced in our times, as there is danger on the roads. And Rabbenu Chaim says that today, it is not a commandment to live in the Land of Israel, as there are several commandments that are dependent upon the land - and several punishments - that we are not able to be careful about and to be cognizant of.